vulms online mcqs test

Question:(1) Find the critical points for the function f(x , y) = 2x^2 - 4x +xy^2

a) (1,0) (0,2) (0,-2) (Answer)

b) (0,1) (2,-2) (2,-1)

c) (1,0) (2,0) (2,-2)

d) (2,-2) (0,2) (0,1)