Evaluate the definite integral: .
Answer and explanation
Correct answer: A.
- Step 1: Integration by parts: let , .
- Step 2: .
- Step 3: Evaluate at : .
- Step 4: Evaluate at : .
- Step 5: Subtract: .
Answer
(e^2 + 1)/4.
Why not the others: '' miscalculates sign of the lower limit; '' forgets the second term.
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