What is the extreme f(x,y)=7y-4(x+y)^2 ?

The extreme f(x,y)=7y-4(x+y)^2 is None

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extreme f(x,y)=7y-4(x+y)^2

extreme points

f (x, y) = 7 y - 4 (x + y)^{2}

None

Solution steps

Find the critical points:

None

7 y - 4 (x + y)^{2}

has no critical points, therefore there are no extreme points

None

f (x, y) = \frac{1}{x - y}

f (x) = 4 x^{5} - 5 x^{4}

f (x, y) = x^{2} + y^{2} - 2 x

e^{- 3.5 x^{2}}

\frac{x ^{2}}{x ^{2} - 4}