If and , what is ?
Answer and explanation
Correct answer: B.
- Step 1: Use integral additivity: .
- Step 2: Solve for : .
- Step 3: Now evaluate the target integral: .
- Step 4: Substitute: .
Answer
.
Why not the others: '10' forgets to integrate the term over ; '14' adds ; '5' is the value of without multiplying by 2 or adding .
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