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A student substitutes t = x^2 in x e^(x^2). The integral is?

Ae^(x^2)/2 + c
Bx^2 e^(x^2)/2 + c
C2e^(x^2) + c
De^(x^2) + c
Answer & Solution
Correct answer: A. e^(x^2)/2 + c
Put t = x^2 so x dx = dt/2, giving half the integral of e^t.
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