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Let f(x,y)=2x+2y+1x2+y2+1f ( x , y ) = \frac { 2 x + 2 y + 1 } { x ^ { 2 } + y ^ { 2 } + 1 }

Question 57

Multiple Choice

Let f(x,y) =2x+2y+1x2+y2+1f ( x , y ) = \frac { 2 x + 2 y + 1 } { x ^ { 2 } + y ^ { 2 } + 1 } . Then f has a relative minimum at


A) (1,1) ( - 1 , - 1 )
B) (1,1) ( - 1,1 )
C) (1,1) ( 1 , - 1 )
D) (1,1) ( 1,1 )
E) (1,12) \left( - 1 , - \frac { 1 } { 2 } \right)

Correct Answer:

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