Question

What is the antiderivative of 4/e^4x?

Answer 1

$\displaystyle F=\int \dfrac{4}{e^{4x}}\, dx\\ F=4 \int e^{-4x}\, dx\\ F=4 \cdot\left(-\dfrac{1}{4}e^{-4x}\right)+C\\ F=-e^{-4x}+C$