- #1

- 278

- 0

## Homework Statement

Use the change of variables ##u=x+y## and ##y=uv## to solve:

[tex] \int_0^1\int_0^{1-x}e^{\frac{y}{x+y}}dydx [/tex]

## Homework Equations

## The Attempt at a Solution

So I got as far as:

[tex] \int\int{}ue^vdvdu. [/tex]

But I just can't find the region of integration in terms of ##u## and ##v##.