Integrate
Junior Member
- Joined
- May 17, 2018
- Messages
- 107
I was looking through integral properties and must have just skipped over it."I can follow along and was able to understand how to determine the new limits of integration. My guess is that multiplying a definite integral by a negative flips the limits but I feel like it would go right back when I substitute back in the original variables."
1) You should know this: [math]\int_{a}^{b}f(x)\;dx = -\int_{b}^{a} f(x)\;dx[/math]
2) Why would you "substitute back in the original variables"? What's the point of changing the limits of integration if you're going to do that?