Find fx(x, y).f(x, y) = x18 - 5x7y23 + 4y-7
A. 18x17 - 35x7y23
B. 18x17 - 5x7y23 + 4y-7
C. 18x17 - 35x6y23
D. 18x17 - 35x7y22 - 28y-8
Answer: C
Mathematics
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