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Find the Extreme Values of the Function Subject to the Given

Question 338

Multiple Choice

Find the extreme values of the function subject to the given constraint.
- f(x,y) =7x2+3y2,x2+y2=1f ( x , y ) = 7 x ^ { 2 } + 3 y ^ { 2 } , x ^ { 2 } + y ^ { 2 } = 1


A) Minimum: 3 at (0,±1) ( 0 , \pm 1 ) ; maximum: 0 at (0,0) ( 0,0 )
B) Minimum: 3 at (±1,0) ( \pm 1,0 ) ; maximum: 7 at (0,±1) ( 0 , \pm 1 )
C) Minimum: 3 at (0,±1) ( 0 , \pm 1 ) ; maximum: 7 at (±1,0) ( \pm 1,0 )
D) Minimum: 3 at (±1,0) ( \pm 1,0 ) ; maximum: 0 at (0,0) ( 0,0 )

Correct Answer:

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