SUBMISSIONS USED

$\frac{2}{3}$

$\frac{2}{3}$

Let $y=(5x\frac{1}{x}{)}^{-2}.$ Then $\frac{dy}{dx}=A(5x\frac{1}{x}{)}^B(5-\frac{1}{x^C}{)}^0,$ where

$A=,$

$B=-3,$

$C=2,$

$D=1,$

$$

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