Originally Posted by

**dankelly07** $\displaystyle

\iint_{\text{R}} {{\text{exp( - x}}^{\text{2}} {\text{ - y}}^{\text{2}} {\text{)dxdy}}}

$

,where R is the quadrant x>0, y>0

$\displaystyle

\iint_{\text{R}} {{\text{exp( - (x}}^{\text{2}} {\text{ + y}}^{\text{2}} {\text{))dxdy}}}

$

$\displaystyle

\iint_{} {{\text{exp( - r}}^{\text{2}} {\text{)rdrd}}\theta }

$]

Ok so I've done a couple of these now, but I always seem to have the problem of picturing this geometrically. Can anyone explain a simple way of knowing how equations like these will look on a graph?

what does it mean 'where R is in the quadrant, x> 0, y>0 ??

I always have problems when trying to define the limits for these types of integrals..