Question

evaluate the given integral using a substitution
7.4e^(-4x+7)dx

Answer 1

\[
u(x) = -4x+7\\
\frac{du}{dx} = -4 \\
du = -4dx\\
dx= -\frac{du}{4}
\]

So then \[\Large
7.4e^{-4x+7}dx\to 7.4e^{u}\left(-\frac{du}{4}\right)
\]

Answer 2

Ok that is a lot easier than I thought. Thank you