Question

How do I solve this integral?

Answer 1

http://i.imgur.com/23jxuc4.png

Answer 2

I am bit rusty on integration. I know I have to use subsitution. So I let u=denominator

Answer 3

yes,
then u =F2A2-F3A3
so, du = ... ?

Answer 4

du=-A3 ?

Answer 5

du = - F3 dA3
right ?

Answer 6

I'm not sure how you got that to be honest.

Answer 7

its like
u = a-bx
differentiate this w.r.t x

Answer 8

a and b are constants?

Answer 9

yep
since we are integrating w.r.t A3
everything except A3 are constants

Answer 10

u= a-bx
du/dx = -b
du = -b dx

so, u =F2A2-F3A3
so, du = -F3 dA3
makes sense ?

Answer 11

I see, clearly I need to brush up on the basic rules, it's been a while haha. Thanks!

Answer 12

yeah,
can solve further ?