Hello. I am having trouble with four problems from my homework.
I don't know why but the answers I get seem wrong and I am not quite sure what I am doing. (although happily i think I completed the rest with no problems yay! just these four are killing me!)
I also am in a situation where I can't spend too much time online so any help is appreciated!
I guess I can start with two questions.
I need to make a substitution and then evaluate the integral but i think i am doing the substitution part incorrectly.