Evaluate .
Answer and explanation
Correct answer: B.
- Step 1: Notice that the numerator is the exact derivative of the denominator . Substitute . When , . When , . Thus . **Answer: . Why not the others:** " upper limit error" evaluates as instead of ; " doubled factor" retains the factor of rather than canceling it in the differential ; " linear result" forgets the logarithmic antiderivative, treating the fraction linearly.
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