189k views
4 votes
Use a linear approximation to estimate the value of (8.07)^2/3.

a) 4.5
b) 5.2
c) 6.1
d) 7.0

1 Answer

1 vote

Final answer:

To estimate the value of (8.07)^2/3 using linear approximation, we can use the formula f(x) ≈ f(a) + f'(a)(x - a), where a is a convenient point, and f'(a) is the derivative of f(x) at a. By substituting the values into the formula, we find that the estimated value is approximately 4.0233.

Step-by-step explanation:

To estimate the value of (8.07)^2/3 using linear approximation, we start by finding the linear approximation of the function f(x) = x^2/3 at a convenient point near 8.07. Let's choose x = 8.

The linear approximation is given by f(x) ≈ f(a) + f'(a)(x - a), where a is the convenient point and f'(a) is the derivative of f(x) at a.

Find f(8) ≈ (8)^2/3 = 2^2 = 4.

Next, find f'(x) = d/dx (x^2/3) = (2/3)(x^(-1/3)).

Now, evaluate f'(a) ≈ (2/3)(8^(-1/3)) ≈ (2/3) * (0.5) = 1/3.

Substitute these values into the linear approximation formula: f(x) ≈ f(a) + f'(a)(x - a) ≈ 4 + (1/3)(8.07 - 8) ≈ 4 + (1/3)(0.07) ≈ 4 + 0.0233 ≈ 4.0233.

Therefore, the estimated value of (8.07)^2/3 using linear approximation is approximately 4.0233.

User Abdo Salm
by
7.5k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.