- #1

Woolyabyss

- 143

- 1

I was looking over my lectures notes and became stumped when the lecturer began manipulating an integral using a dummy variable. I've attached the integral below as a JPEG. I can follow the substitution up until the very end but am having trouble understanding why he replaced u with a positive s and not a negative s at the end.

Any help would be appreciated.

Any help would be appreciated.