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1. ${(1 - x)}^{- 2}$

A. ${(- 1)}^{r} r x^{r}$
B. ${(- 1)}^{r} r x^{r}$
C. ${(- 1)}^{r} r x^{r}$
D. ${(- 1)}^{r} r x^{r}$

Answer: Option D

Explanation:

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