Find fx(x, y).f(x, y) = x ln (4x + 5y)

A. fx(x, y) = ln (4x + 5y) + 
B. fx(x, y) = 
C. fx(x, y) =  + ln (4x + 5y)
D. fx(x, y) = ln (4x + 5y)

Answer: C

Mathematics

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