Q. 25 Approximate the arc length of f ... [FREE SOLUTION]

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Chapter 6: Q. 25 (page 539)

Approximate the arc length of f (x) on [a, b], using the approximation ${鈭�}_{k = 1}^{n} \sqrt{1 + {(\frac{未 y_{k}}{未 x})}^{2}} 路未 x$ with the given value of n. In each problem list the values of $y_{k} = 0, 1, 2 . . . . . . n$ .
$f (x) = x^{3}$ , $[a, b] = [- 2, 2], n = 4$

Short Answer

Expert verified

The arc length is $2 (\sqrt{50} + \sqrt{2})$ .

Step by step solution

Step 1. Given information .

Consider the given function $f (x) = x^{3}$ .

Step 2. Formula used .

The formula used to find arc length is $f (x) = {鈭�}_{k = 1}^{n} \sqrt{1 + {(\frac{未 y_{k}}{未 x})}^{2}} 路未 x$ .

Step 3. Find the arc length .

$f (x) = {鈭�}_{k = 1}^{n} \sqrt{1 + {(\frac{未 y_{k}}{未 x})}^{2}} 路未 x$

$未 x = \frac{2 + 2}{4} = 1 x_{k} = a + k 路未 x x_{0} = - 2 + 0 路 1 = - 2, x_{1} = - 2 + 1 = - 1 x_{2} = - 2 + 2 = 0, x_{4} = - 2 + 4 = 2 未 y_{k} = (未_{k} - 未_{k - 1}) 未 y_{1} = f (x_{1}) - f (x_{0}) = - 1 + 8 = 7 未 y_{2} = f (x_{2}) - f (x_{1}) = 0 + 1 = 1 未 y_{3} = f (x_{3}) - f (x_{2}) = 1 - 0 = 1 未 y_{4} = f (x_{4}) - f (x_{3}) = 8 - 1 = 7$

Arc length $= {\sqrt{1 + (\frac{未 y_{1}}{未 x})}}^{2} 路未 x + \sqrt{1 + {(\frac{未 y_{2}}{未 x})}^{2}} 路未 x + \sqrt{1 + {(\frac{未 y_{3}}{未 x})}^{2}} 路未 x + \sqrt{1 + {(\frac{未 y_{4}}{未 x})}^{2}} 路未 x = \sqrt{1 + {(7)}^{2}} + \sqrt{2} + \sqrt{2} + \sqrt{50} = 2 \sqrt{50} + 2 \sqrt{2} = 2 (\sqrt{50} + \sqrt{2})$

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91影视

Approximate the arc length of f (x) on [a, b], using the approximation ${鈭�}_{k = 1}^{n} \sqrt{1 + {(\frac{未 y_{k}}{未 x})}^{2}} 路未 x$ with the given value of n. In each problem list the values of $y_{k} = 0, 1, 2 . . . . . . n$ .
$f (x) = x^{3}$ , $[a, b] = [- 2, 2], n = 4$

Short Answer

Step by step solution

Step 1. Given information .

Step 2. Formula used .

Step 3. Find the arc length .

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91影视

Approximate the arc length of f (x) on [a, b], using the approximation 鈭�k=1n1+未yk未x2路未xwith the given value of n. In each problem list the values of yk=0,1,2......n.fx=x3,a,b=-2,2,n=4

Short Answer

Step by step solution

Step 1. Given information .

Step 2. Formula used .

Step 3. Find the arc length .

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Logic and Functions

Discrete Mathematics

Calculus

Statistics

Pure Maths

Geometry

Study anywhere. Anytime. Across all devices.

Approximate the arc length of f (x) on [a, b], using the approximation ${鈭�}_{k = 1}^{n} \sqrt{1 + {(\frac{未 y_{k}}{未 x})}^{2}} 路未 x$ with the given value of n. In each problem list the values of $y_{k} = 0, 1, 2 . . . . . . n$ .
$f (x) = x^{3}$ , $[a, b] = [- 2, 2], n = 4$