If , find .
Answer and explanation
Correct answer: A. 23
- Step 1: Differentiate using the power rule : .
- Step 2: Substitute into the derivative expression: .
- Step 3: Perform the arithmetic evaluation: .
Answer
23.
Why not the others: The other options (20, 28, 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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