Two ways to reverse integration order:
- Make a sketch to see where the integral is taken.
- Playin' with inequalities.
hello thanks for your reply. I think for the reverse it would be 0 to 2, x^2 to 4 fcn dydx but i do not know how to integrate that fcn. i think that that fcn cannot be integrated with respect to x and that's why you reverse the order. however, i may have done something incorrectly and can't see it, but i'm getting to have to integrate it anyways, but it's counterpart i could deal with via substitution.