Find ∫e3x dx\displaystyle\int e^{3x}\,dx∫e3xdx.
Select the correct answer.
13e3x+c\frac{1}{3}e^{3x} + c31e3x+c
3e3x+c3e^{3x} + c3e3x+c
e3x+ce^{3x} + ce3x+c
14e4x+c\frac{1}{4}e^{4x} + c41e4x+c