If [tex]\int^{2c}_{c}[/tex] e^f(x)dx = 7, then what is [tex]\int^{2}_{1}[/tex] e^f(cx)dx?(adsbygoogle = window.adsbygoogle || []).push({});

Ok I understood that u-sub is the easiest way to solve this, but what is wrong with trying to find an antiderivative of the first expression and the second, using the FTC and substituting to get the answer? I did it that way and the teacher said I was making the assumption that C = 1 (i think 0 or 1) but he didn't explain to me why it was wrong.

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# Calc Problem

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