3. Lucy wrote \( \int x(x^2 + 1) dx = (\frac{1}{2}x^2)(\frac{1}{3}x^3 + x) + c \). She earned zero points because she didn't show any work! But is Lucy correct? Explain why or why not by showing your work in evaluating the integral.
Added by Helen B.
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∫(x(x^2 + 1)) dx = ∫(x^3 + x) dx Show more…
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