Answer to Question #61960 in Math for musba

Question

1 Evaluate
∫e4xdx

14e4x+c

ex+c

3ex3+c

13ex+c

2 Evaluate
∫xe6xdx

x6e6x−1136e6x+c

x3e6x+116e6x+c

x6e6x+1136e6x+c

−x6e6x+1136e6x+c

3 Find
∫xcosax2dx
with respect to x

cos3x+c

sin2x+c

sec2x+1

12asinax2+c