lim (x,y)→(0,0) (yx^2)/(x^4+y^2)

I don't know how to solve this multi-variable limit with polar coordinates. I tried but it gives me zero and the answer is that this limit doesn't exist.

  • $\begingroup$ This may help. $\endgroup$ – user Nov 1 '20 at 14:52
  • $\begingroup$ This precise question has appeared probably a dozen times on this site. You should learn to search and read what's already here before posting questions. $\endgroup$ – Ted Shifrin Nov 1 '20 at 22:41