i'm having trouble (as always), starting these problems. hints on how to start would be nice.

evaluate the integrals

a).

i think i have to do this by integration by parts, so i have:

.

though i think this is wrong.

b). .

again, i think it's integration by parts, but the 4 and 3 are messing me up

c).

i have

the square root is messing me up, so again, i don't think i selected the parts correctly.

any help on how to get started would be nice.

thank you,

Scott