- Thread starter
- #1
paulmdrdo
Active member
- May 13, 2013
- 386
how would you integrate
1. $\displaystyle \int \left(\frac{x}{y}\right) d\left(\frac{x}{y}\right)$
2. $\displaystyle \int \frac{d(xy)}{(xy)^3}$
if the two is just in this form I could easily answer it
$\displaystyle \int d\left(\frac{x}{y}\right)=(\frac{x}{y})$
$\displaystyle \int d(xy)=(xy)$
but I don't know how to treat $\frac{x}{y}$ in 1 and the $(xy)^3$ in 2.
please help!
1. $\displaystyle \int \left(\frac{x}{y}\right) d\left(\frac{x}{y}\right)$
2. $\displaystyle \int \frac{d(xy)}{(xy)^3}$
if the two is just in this form I could easily answer it
$\displaystyle \int d\left(\frac{x}{y}\right)=(\frac{x}{y})$
$\displaystyle \int d(xy)=(xy)$
but I don't know how to treat $\frac{x}{y}$ in 1 and the $(xy)^3$ in 2.
please help!