if e to the power x + e to the power y = e to the power x + y then prove; dy/dx + e to the power x-y 0
2.if xy.log(x + y)=1
then find dy/dx
if e to the power x + e to the power y = e to the power x + y then prove; dy/dx + e to the power x-y 0
2.if xy.log(x + y)=1
then find dy/dx