If , what is ?
Answer and explanation
Correct answer: B.
- Step 1: Apply the quotient rule: .
- Step 2: Here () and ().
- Step 3: Substitute: .
- Step 4: Evaluate at : .
Answer
.
Why not the others: '5/16' subtracts instead of ; '1/4' simplifies incorrectly as ; '1/16' writes .
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