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Consider the Function f(x,y)=x+y+4x+9yf ( x , y ) = x + y + \frac { 4 } { x } + \frac { 9 } { y }

Question 64

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Consider the function f(x,y)=x+y+4x+9yf ( x , y ) = x + y + \frac { 4 } { x } + \frac { 9 } { y } Determine all the local maximum, minimum and saddle points in the region x>0,y<0x > 0 , y < 0

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(2, -3)is ...

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