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If f(x)=(x²−3)², then f′(1)=
(A) −64
(B) −32
(C) −16
(D) 32

User Brett
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1 Answer

1 vote

Final answer:

To find the derivative of the function f(x) = (x² - 3)² at x = 1, we need to use the chain rule. The derivative is -8, so the correct answer is (D) 32.

Step-by-step explanation:

To find the derivative of the function f(x) = (x² - 3)² at x = 1, we need to use the chain rule. The chain rule states that if we have a composite function g(f(x)), then the derivative of g(f(x)) with respect to x is given by g'(f(x)) * f'(x).

First, let's find the derivative of the outer function g(x) = x² - 3, which is 2(x² - 3). Then, let's find the derivative of the inner function f(x) = x² - 3, which is 2x. Finally, we can substitute x = 1 into both derivatives and multiply them together to find f'(1).

g'(1) = 2(1² - 3) = -4

f'(1) = 2(1) = 2

f'(1) = g'(1) * f'(1) = -4 * 2 = -8

Therefore, the correct answer is (D) 32.

User Amadeo
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