# Math Help - Relation between integrals

1. ## Relation between integrals

Is there a formal relation that links
$\int yxdx$ OR $\int_{a}^{b}yxdx$
with
$\int xydy$ OR $\int_{a}^{b}xydy$
where $y=f(x)$ over the interval $x\in\left[a,b\right]$.

2. ## Re: Relation between integrals

xy and yx are exactly the same thing.

Have you studied integration by parts yet?