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Find the integral of x e^x by taking x as the first function.
Ae^x (x - 1)
Be^x (x + 1)
Cx e^x
Dx^2 e^x / 2
Answer & Solution
Correct answer: A. e^x (x - 1)
Taking x as first function gives x e^x minus the integral of e^x, which is e^x (x - 1).
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