Sorry about the parentheses; I corrected it. Actually, I want to know what dx represents behind the integral sign.
Why is it needed, other than to indicate the variable your integrating with respect to? In my calculus book, the first time dx shows up behind the integral, is in the definition...
Can someone, who really knows and understands, tell me what dx (or whatever variables given) means behind the integral sign? I have seen more disagreement in Calculus books concerning this. Some authors say it's there just to "indicate the variable" your integrating with respect to, i.e., its...