What is the critical xy^2+2xy+3x^3-3x ?

The critical xy^2+2xy+3x^3-3x is (0,1),(0,-3),(2/3 ,-1),(-2/3 ,-1)

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critical xy^2+2xy+3x^3-3x

critical points

x y^{2} + 2 x y + 3 x^{3} - 3 x

(0, 1), (0, - 3), (\frac{2}{3}, - 1), (- \frac{2}{3}, - 1)

Solution steps

x y^{2} + 2 x y + 3 x^{3} - 3 x

Find where

\nabla f (x, y)

is equal to zero or undefined

(0, 1), (0, - 3), (\frac{2}{3}, - 1), (- \frac{2}{3}, - 1)

What is the critical xy^2+2xy+3x^3-3x ?
The critical xy^2+2xy+3x^3-3x is (0,1),(0,-3),(2/3 ,-1),(-2/3 ,-1)