doesn't become , it becomes , and CAN be integrated using a substitution.
\iint(lower case B) e^-2((x^2)+(y^2)) dydx
where B is the quarter of the circle of radius 1 in the upper right-hand quadrant
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ok so e^-2((x^2)+(y^2)) becomes e^-2(r^2)
the inner limits are between 0<r<1 since r=1
and the integral goes from dydx to dr d(theta)
the outer limit is 0<theta<(pi/2) since were are dealing with the top right hand quadrant?
can the integral e^-2(r^2) dr be done? i cant see how, unless we change the order? could be way off there though.