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Let f(x,y)=sin(xy+y2)f ( x , y ) = \sin \left( x y + y ^ { 2 } \right)

Question 71

Multiple Choice

Let f(x,y) =sin(xy+y2) f ( x , y ) = \sin \left( x y + y ^ { 2 } \right) . Then fxx(x,y) f _ { x x } ( x , y ) is


A) xy2sin(xy+y2) - x y ^ { 2 } \sin \left( x y + y ^ { 2 } \right)
B) y2sin(xy+y2) y ^ { 2 } \sin \left( x y + y ^ { 2 } \right)
C) y2sin(xy+y2) - y ^ { 2 } \sin \left( x y + y ^ { 2 } \right)
D) x2sin(xy+y2) - x ^ { 2 } \sin \left( x y + y ^ { 2 } \right)
E) x2sin(xy+y2) x ^ { 2 } \sin \left( x y + y ^ { 2 } \right)

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