# Math Help - Switching limits of an integral

1. ## Switching limits of an integral

Quick question:

For the integral of f(x) from a to b (b > a), is it possible to switch the limits to be from b to a? Does it require some sign changes?

2. Originally Posted by borracho
Quick question:

For the integral of f(x) from a to b (b > a), is it possible to switch the limits to be from b to a? Does it require some sign changes?
yes, $\int_a^b f(x)~dx = - \int_b^a f(x)~dx$

3. So it makes sense to integral from b to a, even though b is larger?

4. Originally Posted by borracho
So it makes sense to integral from b to a, even though b is larger?
yes, it makes sense. just change the sign to switch the limits, and you're fine.