"in many points of the graph of the function f (x, y) = y ^ 2 * e ^ (yx ^ 2) the tang

davibeast

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"in many points of the graph of the function f (x, y) = y ^ 2 * e ^ (yx ^ 2) the tang

hey, i need some help with this question: "in many points of the graph of the function f (x, y) = y ^ 2 * e ^ (yx ^ 2) the tangent plane is horizontal?"

I tried to see where the gradient = 0 and I get y=0,e ^ xy = 0, and then the answer would be: infinite
I tried to see the Taylor polynomial centered at (a, 0) and I still comes out: infinite points

I'm sure that there's a plane with equation Z=0...


My doubt is: since I am compelled to respond with an integer, where am I wrong?

Thank you
 
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