Recent content by makavelian

Thank you!

so you're saying to make r=x²+y²? with x=rcos\vartheta and y=rsin\vartheta? how would I sub that in? or even isolate for x³?

Homework Statement let f(x,y)=(x4+y4)1/3 a)find f1 for (x,y)\neq(0,0) b)prove that lim(x,y)\rightarrow(0,0)f1(x,y)=0 c) is f1 contintoius at (0,0)? The Attempt at a Solution f1=4x³/3(x4+y4)2/3 along any line y=mx, it is 0, along y=x² I run into a problem, where i get 4x1/3/3(1+x4)2/3...