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## Homework Statement

A few:

(1) lim(x,y) -> (0,0) of (x^4*y^2)/(x^2 + y^2)2

(2) lim(x,y) -> (0,0) of x^4 / (y+x^2)

## Homework Equations

## The Attempt at a Solution

(1) i get that it exists and equals 0 by using polar coordinates

(2) i get that it exists (except for the parabolic path y=-x^2) and equals zero [using (t, mt) and (t, mt^2)]

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