If xy . yx = 16, then the value of \(\frac{d y}{d x}\) at (2, 2) is
A. -1
B. 0
C. 1
D. none of these
Answer:A
If xy . yx = 16, then the value of \(\frac{d y}{d x}\) at (2, 2) is
A. -1 B. 0 C. 1 D. none of these