I know that it's 6x^2 - 2 but when I'm trying take the derivative of the integral shouldn't I have to multiply each term by -1 because the x is in the lower bound? It gives a wrong answer, so am I doing something wrong or is it just that I'm not supposed to take the opposite in this case?(adsbygoogle = window.adsbygoogle || []).push({});

[tex]

\[ \int_x^{-1} (2-6t^2)\,dt\]

-1 * 2(-1 - x) - -1*6*(-1-x^3)/3

[/tex]

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# Error in taking the derivative of an integral

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