let u = 3x
so, du = 3dx, or dx = du/3
integral e^3x dx = integral e^u du/3
you can surely take it from there. . .
Evaluate (integral) e^3x dx.
A. e^3x + C
B. 1/3e^3x + C
C. e^4x + C
D. 1/4e^4x + C
1 answer
A. e^3x + C
B. 1/3e^3x + C
C. e^4x + C
D. 1/4e^4x + C
1 answer