Bonjour !
Pour obtenir la deuxième ligne de l'équation que vous avez donnée, on peut tout simplement développer le terme Un+1 en utilisant la définition de Un+1 donnée par la relation de récurrence :
Un+1 = 2Un + 1/3(n+1)
En remplaçant Un+1 dans l'expression Un+1 - Un, on obtient :
Un+1 - Un = (2Un + 1/3(n+1)) - Un
On simplifie l'expression en combinant les termes similaires :
Un+1 - Un = 2Un - Un + 1/3(n+1)
Un+1 - Un = Un + 1/3(n+1)
Maintenant, pour obtenir la troisième ligne de l'équation, on peut factoriser Un - Un+1 en utilisant le signe moins :
Un - Un+1 = - (Un+1 - Un)
Un - Un+1 = - (Un+1 - 2Un - 1/3(n+1))
Un - Un+1 = - (-2Un - Un+1 - 1/3(n+1))
Un - Un+1 = 2/3Un + 1/3(n+1) - 1/3Un - 2/3Un - 1/3(n+1)
On simplifie à nouveau en combinant les termes similaires :
Un - Un+1 = -1/3Un + 1/3(n+1)
Enfin, pour obtenir la quatrième ligne de l'équation, on utilise l'associativité de l'addition pour regrouper les termes :
Un - Un+1 = -1/3Un + 1/3(n+1)
Un - Un+1 = 1/3(n+1) - 1/3Un
Un - Un+1 = 1/3(n+3 - Un)
J'espère que cela vous aide à comprendre la démonstration de cette relation de récurrence. N'hésitez pas à me poser d'autres questions si vous en avez besoin !
Which choice is equivalent to the fraction below when x is an appropriate value? Hint: Rationalize the denominator and simplify.
[tex]-\frac{1}{2} .(1 + \sqrt{3} )[/tex] is equivalent to the fraction below when x is an appropriate value .
What are equivalent expressions?
Equivalent expressions are expressions that work the same even though they look different. If two algebraic expressions are equivalent, then the two expressions have the same value when we plug in the same value(s) for the variable(s).
How to solve Fractions ?
Step 1: Find the least common denominator. ...
Step 2: Multiply the least common denominator. ...
Step 3: Simplify the equation. ...
Step 4: Simplify until there's one term on both sides. ...
Step 5: Divide the coefficient on both sides.
Now,
[tex]\frac{\sqrt{13} }{\sqrt{3} - 3 } \\\\= \frac{\sqrt{3} }{\sqrt{3} - 3 }. \frac{\sqrt{3} +3 }{\sqrt{3} +3} \\\\= \frac{3 +3 \sqrt{3} }{3 - 9} \\\\= -\frac{1}{2} .(1 + \sqrt{3} )[/tex]
Hence , [tex]-\frac{1}{2} .(1 + \sqrt{3} )[/tex] is equivalent to the fraction below when x is an appropriate value .
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Does the following equation show a linear or nonlinear function? Linear Nonlinear y=-2x³-6
The equation y = -2x³ - 6 represents a nonlinear function.
What is linear function and nonlinear function?
The highest for linear functions is only one, whereas nonlinear functions have more.
The equation y = -2x³ - 6 represents a nonlinear function because the highest power of x, which is 3, is greater than 1. In general, a function is considered linear if it can be written in the form y = mx + b, where m is the slope of the line and b is the y-intercept. In this case, the equation cannot be written in that form because of the presence of x³, which makes the relationship between x and y nonlinear.
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Two companies offer the following rates for renting photocopiers:
- Kan Enterprise: $50 per month and $0.06 per copy;
- Enterprise Dev: $75 per month and $0.05 per copy,
For what number of copies is the total price charged by companies the same?
prove that if a symmetric matrix is invertible, then its inverse is symmetric also.
Let A be a symmetric matrix that is invertible. This means that there exists a matrix B such that AB = BA = I, where I is the identity matrix. We want to show that B is also symmetric, that is, [tex]B = B^{T}[/tex]
To prove this, we can use the definition of matrix inversion. We know that AB = I, so we can take the transpose of both sides:
[tex]AB^{T} = I^{T}[/tex]
Using the transpose rules, we can rewrite this as:
[tex]B^{T} * A^{T}[/tex] = I
Now, we can multiply both sides of this equation by A:
[tex]B^{T} * A^{T}[/tex]* A = A
Since A is invertible, we can multiply both sides by A⁻¹ to get:
[tex]B^{T}[/tex] = A⁻¹
Therefore, we have shown that the inverse of a symmetric matrix A, which we denote as A⁻¹, is also symmetric, since A⁻¹ = [tex]B^{T}[/tex], which is the transpose of the matrix B.
Hence, we have proved that if a symmetric matrix is invertible, then its inverse is symmetric as well.
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Will mark BRAINLIEST
The surface area to volume ratio is written as 6x squared : x cubed
Where x >0
What value of x would make the ratio 1:1
Answer:
The value of x would make the ratio 1:1 is 6.
Step-by-step explanation:
The given ratio is:
Surface Area : Volume = 6x^2 : x^3
To find the value of x that makes this ratio 1:1, we need to set the two parts of the ratio equal to each other and solve for x:
6x^2 = x^3
Divide both sides by x^2 to obtain:
6 = x
Therefore, the value of x that makes the ratio 1:1 is x = 6.
what is 180lbs in kg?
180 lbs is approximately equal to 81.65 kg ( rounded to four decimal places )
The conversion factor to convert lbs to kilogram is 0.453592
1 lbs = 0.453592 kg
The conversion is the process of changing the unit of one quantity to another units
The conversion factor is defined as the number that is used to change one unit to another units by multiplying or dividing
The mass in kg = The mass in lbs × conversion factor
Substitute the values in the equation
1 lbs = 0.453592 kg
180 lbs = 180 × 0.453592
Multiply the numbers
= 81.6466 ( rounded to four decimal places )
Therefore, 180lbs is 81.6466
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how to convert 168 lbs to kg?
On converting 168 lbs to Kilogram , we get that 168 lbs is equivalent to 76.188 Kg .
The conversion factors can be used to convert between pounds and kilograms. For example ;
To convert 1 pound to kilograms: We multiply the number of pounds by 0.4535 .
We have to convert 168 pounds to kilograms ;
So , we multiply the given weight in pounds with 0.4535 .
On multiplying ,
We get ;
⇒ 168 pounds = 168 × 0.4535 Kg ;
⇒ 168 pounds = 76.188 Kg .
Therefore , 168 lbs is approximately equal to 76.188 Kg .
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A geometric progression has eight terms. The first term is 256 and the common ratio is 1/2.
An arithmetic progression has 51 terms and common difference is 1/2.
The sum of all the terms in the geometric progression is equal to the sum of all the terms in the arithmetic progression. Find the first term and the last term in the arithmetic progression.
The first term and the last term in the arithmetic progression are -2.5 and 22.5 respectively.
How to calculate the sum of a geometric sequence?In Mathematics, the sum of a geometric sequence is given by this mathematical expression:
[tex]S=\frac{a_1(1-r^n)}{1-r}[/tex]
Where:
aₙ or n represents the nth term of a geometric sequence.r represents the common ratio.a₁ represents the first term of a geometric sequence.How to calculate the sum of an arithmetic sequence.Mathematically, the sum of an arithmetic sequence is calculated by using this expression:
Sn = n/2(2a₁ + (n - 1)d)
Where:
Sn represents the sum of an arithmetic sequence?d is the common difference.a₁ is the first term of an arithmetic sequence.n is the total number of terms.Since the sum of all the terms in the geometric progression is equal to the sum of all the terms in the arithmetic progression, we have:
256(1 - 0.5^8)/(1 - 0.5) = 51/2(2a₁ + (51 - 1)0.5)
256(1 - 0.00390625)/(0.5) = 25.5(2a₁ + 25)
255/0.5 = 51a₁ + 637.5
510 = 51a₁ + 637.5
51a₁ = -127.5
a₁ = -2.5
For the last term, we would use the following formula:
aₙ = a₁ + (n - 1)d
a₅₁ = -2.5 + (51 - 1)4
a₅₁ = -2.5 + (50)0.5
a₅₁ = 22.5.
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how to convert 20kg in pounds?
20 kg is approximately equal to 44.0925 pounds ( rounded to four decimal places )
The conversion factor to convert kg to pounds is 2.20462
1 kg = 2.20462 pounds
The conversion is the process of changing the unit of one quantity to another units
The conversion factor is defined as the number that is used to change one unit to another units by multiplying or dividing
The mass in pounds = The mass in kg × conversion factor
Substitute the values in the equation
1 kg = 2.20462 pounds
20 kg = 20 × 2.20462
Multiply the numbers
= 44.0925 pounds ( rounded to four decimal places )
Therefore, 20 kg is 44.0925 pounds
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the hypergeometric distribution should be used instead of the binomial distribution when: a. each trial is independent b. there are more than two outcomes on a single trial c. there is a fixed number of trials d. sampling does not involve replacement
The hypergeometric distribution should be used instead of the binomial distribution. The correct option is d. Sampling does not involve replacement,
What is binomial distribution ?
The binomial distribution is a probability distribution that describes the probability of getting a certain number of successes in a fixed number of independent trials, where each trial has only two possible outcomes: success or failure.
The probability of getting exactly k successes in n trials with probability of success p is given by the formula:
[tex]P(k) = (n choose k) * p^k * (1 - p)^(n - k)[/tex]
where (n choose k) is the binomial coefficient, which gives the number of ways to choose k items out of n, and is equal to:
[tex](n choose k) = n! / (k! * (n - k)!)[/tex]
where n! represents n factorial, which is the product of all positive integers up to n.
Given by the question:
The correct answer is d. sampling does not involve replacement.
Therefore, when sampling does not involve replacement, the hypergeometric distribution should be used instead of the binomial distribution.
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What is the length of Line segment A B? Round to the nearest tenth.
Triangle A B C is shown. Angle A C B is a right angle and angle C A B is 75 degrees. The length of C A is 10 meters and the length of hypotenuse A B is x.
9.7 m
10.4 m
37.3 m
38.6 m.
The length of the line segment AB is 38.6 m. The solution has been obtained by using trigonometry.
What is trigonometry?
The study of the sides, angles, and connections of the right-angle triangle falls under the umbrella of the branch of mathematics known as trigonometry.
We are given a right angled triangle, with angle ACB = 90° and angle CAB = 75°.
We know that cos theta = adjacent side/hypotenuse
So,
⇒cos θ = 10/x
Here, θ = 75°
So,
⇒cos 75° = 10/x
⇒x = 10/cos 75°
⇒x = 38.6
Hence, the length of the line segment AB is 38.6 m.
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A 6-sided die is tossed. Find P (even | less than 3).
The value of probability P (even | less than 3) is, 1/3.
What is mean by Probability?The term probability refers to the likelihood of an event occurring. Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one.
Given that;
A 6-sided die is tossed.
Here, Two numbers 1 and 2 are less than 3.
Hence, The value of P (even | less than 3) is,
⇒ 2 / 6
⇒ 1 / 3
Thus, The value of P (even | less than 3) is, 1/3.
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how to convert 147 lbs to kg?
The measure of the value after converting 147 pounds to kilograms is equal to ( 66.6792 ) kilograms.
Pounds and Kilograms are units to measure the weight of a given body.Relation of 1 kilograms = 2.20462 pounds.
⇒ 2.20462 pounds = One kilograms
⇒ 1 pounds = ( 1 / 2.20462 ) kilograms
⇒1 pounds = ( 0.4536 ) kilograms
Substitute the value 147 pounds we get,
⇒ 147 pounds = ( 147 × 0.4536 ) kilograms
⇒ 147 pounds = ( 66.6792 ) kilograms
Therefore, after converting the value 147 pounds to kilogram is equal to ( 67.1328 ) kilograms .
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translate each word phrases into a number phrase 1. Fifteen increased by twenty 2. The quotient of a number and 4 3. The difference of twice a number and 11 4. The product of two consecutive numbers 5. A number increased by 24 is equal to thrice 10 6. Twice a number is 84-8 7. Seven minus four times a number is 15
Answer:
Here is the answer.
Step-by-step explanation:
The translation of the phrases are written below,
Fifteen increased by twenty can be written as ,15 + 20. The quotient of a number and 4 can be written as x/4( where x is the number). The difference of twice a number and 11 can be written as 2x - 11, where x is the number. The product of two consecutive numbers can be written as n(n+1), where n is the smaller of the two consecutive numbers. A number increased by 24 is equal to thrice 10 can be written as x + 24 = 3*10, where x is the number. Twice a number is 84-8 can be written as 2x = 84 - 8, where x is the number. Seven minus four times a number is 15 can be written as 7 - 4x = 15, where x is the number.The bacteria took 1 hour and 40 minutes to fill the initial bottle explain how it only took 10 minutes to fill 3 additional empty bottles
Due to the exponential growth of bacteria it only took 10 minutes to fill 3 additional empty bottles.
What is an exponential function?
The formula for an exponential function is f(x) = a^x, where x is a variable and a is a constant that serves as the function's base and must be bigger than 0.
The bacteria took more time to double from 1 cell to a bottle full of cells. Once the bottle was full, each cell in the full bottle doubled, causing an additional bottle to be filled in 5 minutes.
Then the 2 full bottles doubled in the next 5 minutes, causing all 3 bottles to be full.
The answer needed is -
The full bottle doubled after 5 minutes.
The 2 full bottles doubled after 5 minutes.
Exponential growth is a multiplicative rate of change.
Therefore, due to exponential growth bacteria filled the bottle fast.
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Answer:
The bacteria took more time to double from 1 cell to a bottle full of cells. Once the bottle was full, each cell in the full bottle doubled, causing an additional bottle to be filled in 5 minutes. Then the 2 full bottles doubled in the next 5 minutes, causing all 3 bottles to be full.
can it be concluded that the given parallelogram is either a rhombus, a rectangle, or a square? explain.
Here in the given diagram all the sides are equal and the diagonals are perpendicular. So the given parallelogram is a rhombus.
Here the data given are
ABCD is a parallelogram
∠BOC = 90°
So AOB = 180 - ∠BOC ( angle of a straight line is 180°)
∠ AOB = 180-90 = 90°
Also ∠ COD = ∠DOA = 90°
OA = OC, OB= OB ( Diagonals of a parallelogram bisect each other)
So the triangles are congruent. So AB = BC
Similarly ΔBOC and ΔCOD are congruent, BC= CD
Similarly ΔCOD and ΔDOA are congruent, CD= AD
So, AB = BC = CD= DA
Since all sides are equal and diagonals are perpendicular, the given parallelogram is a rhombus.
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The complete question is given as the image below.
What is the conversion of 5.5 inches to mm?
The value of "5.5 inches" after conversion to millimeter is equivalent to 139.7mm .
To convert the number 5.5 inches to millimeters, we use the conversion factor ;
The Conversion Factor is defined as a mathematical ratio which is used to convert a measurement from one unit to another unit .
We know that 1 inch is approximately equal to 25.4 millimeters,
So , the conversion factor is 25.4 mm ;
On multiplication , we get ;
⇒ 5.5 inches × 25.4 millimeters/inch = 139.7 millimeters .
Therefore, 5.5 inches is equal to 139.7 millimeters .
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How to convert 73kg to pounds?
The value of weight of 73 kg when converted to pounds is 160.93726 pounds.
kilogram is the standard unit of mass in the International System of Units (SI), while pounds are a common unit of mass used in the United States and other countries.
To Know how to convert between different units of measurement is essential for accurate calculations and comparisons. convert 73kg to pounds, you can use the formula: 1 kilogram is equal to 2.20462 pounds.
Therefore, to convert 73kg to pounds, you would multiply 73 by 2.20462.
73 x 2.20462 = 160.93726 pounds
So, weight of 73kg is equivalent to 160.93726 pounds
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what is 15.6 divided by 100
Answer:
[tex]15.6 \div 100 = .156[/tex]
Step-by-step explanation:
100 is 10 to the second power. Since you are dividing, move the decimal point in 15.6 two places to the left. So .156 is your answer.
Answer:0.156
Step-by-step explanation:
A yoga class begins at 6:45 pm and lasts for 1/2 hours. Jo 40 minutes to pack away after the class finishes. What time does jo finish packing after the class?
Answer:
7:55
Step-by-step explanation:
If the class is 30 minutes it would end at 7:15 then add 40 minutes to get 7:55.
Which inequality written in factored form represents the graphed region?
Answer:
Below
Step-by-step explanation:
The shaded area is the area GREATER than ('>') the graph (it is ABOVE the graph)
the two zeroes (where it crosses the x -axis) of the graph are - 6 and 18
so the parabola is y = (x+6)(x-18)
but we want the shaded region so it becomes y> (x+6)(x-18)
It is '>' because the shaded area DOES NOT INCLUDE the graph line (that is why it is a dashed line)
A bag contains 9 blue marbles and 45 white marbles. If a representative sample contains 2 blue marbles, then how many white marbles would you expect it to contain? Explain.
Because the ratio of blue marbles to white marbles is ___
in the population, the expected number of white marbles is ___ times the number of marbles in the representative sample. There should be ___ white marbles.
Please help me ASAP ty!
10 is five times larger than 2, and the ratio of blue to white marbles in the population is 1:5
What is ratio ?
Ratio can be defined as given value divided by total value.
The ratio of blue marbles to white marbles in the population is:
9 blue marbles : 45 white marbles
which simplifies to:
1 blue marble : 5 white marbles
If a representative sample contains 2 blue marbles, we can use this ratio to find the expected number of white marbles in the sample:
2 blue marbles × 5 white marbles/blue marble = 10 white marbles
Therefore, we would expect the representative sample to contain 10 white marbles.
To explain this result, we can think of the representative sample as a smaller version of the population, where the ratio of blue marbles to white marbles is the same. Since we know that the ratio of blue to white marbles in the population is 1:5, we can use this ratio to estimate the number of white marbles we would expect to see in the sample, given that we have observed 2 blue marbles. In this case, we would expect to see 10 white marbles,
Hence, 10 is five times larger than 2, and the ratio of blue to white marbles in the population is 1:5
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what is the initial value problem calculator?
The initial value problem calculator is a tool used to calculate differential equations.
An instrument for solving ordinary differential equations with initial conditions is an initial value problem calculator. Finding a function that solves a given differential equation and a set of initial conditions is the goal of this calculator, a particular kind of differential equation problem. The differential equation, the beginning conditions, and other pertinent parameters are entered into the calculator, which then generates a solution that fulfils the initial conditions.
Usually, the answer is provided as a function that specifies how the system behaves over time. In disciplines like physics, engineering, and economics, where differential equations are regularly employed to represent dynamic systems, these calculators are widely used. They can be helpful for obtaining an understanding of a system's behavior and for predicting its upcoming trends
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LLLLLLLLLLLLLLLLLLOSERRRRRRRRRRRRRRRRRRRRRRRRRRRRR (im quitting....)
Answer:
good for you
Step-by-step explanation:
:)
Answer;
the only LLLLLLLLLLLLLLLLLLOSERRRRRRRRRRRRRRRRRRRRRRRRRRRRR is you
Step-by-step explanation:
Connie is buying snacks for a hike. She purchased a bag of trail mix for $6.98 and a large bottle of water for $2.15.
What was Connie's total bill?
Connie's total bill is sum of trail mix and water will be $9.13.
What is sum ?
In mathematics, the sum refers to the result of adding two or more numbers together. It is a basic arithmetic operation, often used in many different mathematical concepts and calculations. The symbol for addition is '+', and the sum of a set of numbers is often represented using the capital Greek letter sigma (∑).
According to the question:
Connie's total bill would be the sum of the cost of the trail mix and the cost of the water, which is:
Total bill = cost of trail mix + cost of water
Total bill = $6.98 + $2.15
Total bill = $9.13
Therefore, Connie's total bill was $9.13.
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What is calculator vertex form of a parabola online?
The vertex form of a parabola is y = a(x - h)² + k , where: a — Same as the a coefficient in the standard form; h — x-coordinate of the parabola vertex; and. k — y-coordinate of the parabola vertex.
The extremal value of a quadratic curve is represented by the vertex of a parabola, which is a point. The quadratic portion is still valid because two is our variable's most important power (x). For a parabola to open up, the vertex can either be a minimum or a maximum (for a parabola opening down).
As an alternative, we might state that the parabola's vertex is where its symmetry axis meets it.
The vertex is typically represented by the point P(h,k), where h stands for the x-coordinate and k for the y-coordinate.
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What sum of money lent out at 6 1/4 p. A to get 75 rupees as intrest in 8 months
The sum of money lent out at 6 1/4 p.a. to get 75 rupees as interest in 8 months is 1800 rupees.
To find the sum of money lent out at 6 1/4 p.a. to get 75 rupees as interest in 8 months, we can use the formula for simple interest:
I = P × R × T
Where:
- I is the interest
- P is the principal (the sum of money lent out)
- R is the annual interest rate
- T is the time in years
In this case, we know that I = 75, R = 6.25% (6 1/4 p.a.), and T = 8/12 (8 months is 8/12 of a year). We can plug these values into the formula and solve for P:
75 = P × 6.25% × 8/12
75 = P × 0.0625 × 0.6666666666666666
75 = P × 0.041666666666666664
P = 75 ÷ 0.041666666666666664
P = 1800
Therefore, the sum of money lent out at 6 1/4 p.a. to get 75 rupees as interest in 8 months is 1800 rupees.
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what is 35km in miles?
Based on the conversion factor, 35km is equivalent to approximately 21.75 miles.
Kilometers and miles are units of distance measurement used in different parts of the world. While kilometers are the standard unit of distance in most countries, miles are widely used in the United States, the United Kingdom, and a few other countries.
A kilometer is approximately 0.621371 miles, which means that 1 mile is roughly 1.609344 kilometers.
To convert 35km to miles, we need to use this conversion factor. We can start by setting up a proportion:
35 km = x miles
1 km = 0.621371 miles
Multiplying both sides by the conversion factor, we get:
35 km x 0.621371 miles/1 km = x miles
Simplifying this expression, we get:
21.748485 miles = x miles
In conclusion, measurements are essential in our daily lives, and knowing how to convert one measurement to another can be beneficial. In this article, we explored what 35km in miles means and how we can convert kilometers to miles. Remember that 1km is approximately 0.621371 miles, and we can use this conversion factor to convert any distance measurement from kilometers to miles or vice versa.
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Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. a chessboard has 64 squares. george places 1 grain of rice on the first square, 2 grains on the second square, 4 grains on the third square, 8 grains on the fourth square, and so on, until he has placed grains of rice on 10 squares. once george has put rice on the 10th square, he has placed a total of____grains of rice on the chess board.
George has put rice on the 10th square, he has placed a total of 1,023 grains of rice on the chessboard.
What is geometric progression ?
A geometric progression, also known as a geometric sequence, is a sequence of numbers in which each term is obtained by multiplying the previous term by a fixed number called the common ratio.
The general form of a geometric progression is:
[tex]a, ar, ar^2, ar^3, ...[/tex]
where:
a is the first term of the sequence
r is the common ratio between successive terms
Given by the question:
To find the total number of grains on the first 10 squares, we can use the formula for the sum of a geometric series, which is:
[tex]sum = a(1 - r^n) / (1 - r)[/tex]
where:
a is the first term (in this case, 1)
r is the common ratio (in this case, 2)
n is the number of terms (in this case, 10)
Using this formula, we can calculate the sum of the grains of rice on the first 10 squares as:
[tex]sum = 1(1 - 2^10) / (1 - 2)[/tex]
[tex]sum = 1(1 - 1024) / (-1)[/tex]
[tex]sum = 1023[/tex]
Therefore, once George has put rice on the 10th square, he has placed a total of 1,023 grains of rice on the chessboard.
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Ben reached into his wallet without looking and took out two bills. What is the probability that each bill will be worthless $10
The probability that Ben will find two worthless $10 bills in his wallet is practically impossible.
What is Probability?Probability is a branch of mathematics that deals with the likelihood of an event occurring. It is the measure of the likelihood of an event occurring divided by the number of possible outcomes. Probability is used to determine the chances of a particular outcome occurring and can range from 0 to 1.
The probability that each bill will be a worthless $10 bill is very low. This is because the US Federal Reserve has discontinued the production of $10 bills in 2006, so the likelihood of finding two of them in circulation is highly unlikely. Additionally, bills are often replaced after a certain amount of time due to wear and tear, so the probability of finding two bills in circulation that are both from the discontinued series is even lower.
The chances of finding two $10 bills from the discontinued series in circulation is so extremely rare that it has been estimated to be one in ten million. Even though it is possible to find two bills from the discontinued series, it is extremely unlikely that one would carry two of them in their wallet. Therefore, the probability that Ben will find two worthless $10 bills in his wallet is practically impossible.
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