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Applying the Chain Rule to a Composite Function

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Consider the function g(x)=(2x3+5)4g(x) = (2x^3 + 5)^4. Which of the following correctly finds the derivative g′(x)g'(x) and accurately describes the application of the Chain Rule?

A

g′(x)=4(2x3+5)3⋅(2x3+5)g'(x) = 4(2x^3 + 5)^3 \cdot (2x^3 + 5), showing that the derivative involves the outer function’s derivative multiplied by the inner function itself, simplifying nested differentiations.

B

g′(x)=4(2x3+5)3⋅6x2g'(x) = 4(2x^3 + 5)^3 \cdot 6x^2, showing that we first differentiate the outer function (power of 4) and then multiply by the derivative of the inner function, which can be extended to more complex nested functions.

C

g′(x)=4(2x3+5)3+6x2g'(x) = 4(2x^3 + 5)^3 + 6x^2, illustrating that we differentiate the outer and inner functions separately and then add them together, which simplifies the process for nested functions.

D

g′(x)=(2x3+5)4⋅6x2g'(x) = (2x^3 + 5)^4 \cdot 6x^2, demonstrating that we only need to differentiate the inner function and multiply it by the original outer function, regardless of complexity.

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