If , find .
Answer and explanation
Correct answer: C. 28
- Step 1: Differentiate using the power rule : .
- Step 2: Substitute into the derivative expression: .
- Step 3: Perform the arithmetic evaluation: .
Answer
28.
Why not the others: The other options (32, 60, 8) result from applying the power rule incorrectly, forgetting to differentiate lower-order terms, or arithmetic substitution errors.
Practise more Continuity and differentiability.
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