Find the value.If F(x, y) = 
, find Fx(-4, -9) and Fy(-4, -9).
A. Fx(-4, -9) = - 
, Fy(-4, -9) = 
B. Fx(-4, -9) = 
, Fy(-4, -9) = 
C. Fx(-4, -9) = 
, Fy(-4, -9) = - 
D. Fx(-4, -9) = 
, Fy(-4, -9) = - 
Answer: A
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B. 
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