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Calculate ∂2f∂y2\frac { \partial ^ { 2 } f } { \partial y ^ { 2 } }

Question 73

Multiple Choice

Calculate ∂2f∂y2\frac { \partial ^ { 2 } f } { \partial y ^ { 2 } } , ∂2f∂xy\frac { \partial ^ { 2 } f } { \partial x y } and evaluate each at (5,7) ( 5,7 ) . f(x,y) =950−16x+14y+6xyf ( x , y ) = 950 - 16 x + 14 y + 6 x y


A) ∂2f∂y2∣(5,7) =6\left. \frac { \partial ^ { 2 } f } { \partial y ^ { 2 } } \right| _ { ( 5,7 ) } = 6 , ∂2f∂xy∣(5,7) =0\left. \frac { \partial ^ { 2 } f } { \partial x y } \right| _ { ( 5,7 ) } = 0
B) ∂2f∂y2∣(5,7) =0\left. \frac { \partial ^ { 2 } f } { \partial y ^ { 2 } } \right| _ { ( 5,7 ) } = 0 , ∂2f∂xy∣(5,7) =0\left. \frac { \partial ^ { 2 } f } { \partial x y } \right| _ { ( 5,7 ) } = 0
C) ∂2f∂y2∣(5,7) =16\left. \frac { \partial ^ { 2 } f } { \partial y ^ { 2 } } \right| _ { ( 5,7 ) } = 16 , ∂2f∂xy∣{5,7) =14\left. \frac { \partial ^ { 2 } f } { \partial x y } \right| _ { \{ 5,7 ) } = 14
D) ∂2f∂y2∣(5,7) =6\left. \frac { \partial ^ { 2 } f } { \partial y ^ { 2 } } \right| _ { ( 5,7 ) } = 6 , ∂2f∂xy∣(5,7) =6\left. \frac { \partial ^ { 2 } f } { \partial x y } \right| _ { ( 5,7 ) } = 6
E) ∂2f∂y2∣(5,7) =0\left. \frac { \partial ^ { 2 } f } { \partial y ^ { 2 } } \right| _ { ( 5,7 ) } = 0 , ∂2f∂xy∣(5,7) =6\left. \frac { \partial ^ { 2 } f } { \partial x y } \right| _ { ( 5,7 ) } = 6

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