1.

\[{{(r+1)}^{th}}\] term in the expansion of \[{{(1-x)}^{-4}}\]will be

A. \[\frac{{{x}^{r}}}{r!}\]
B. \[\frac{(r+1)(r+2)(r+3)}{6}{{x}^{r}}\]
C. \[\frac{(r+2)(r+3)}{2}{{x}^{r}}\]
D. None of these
Answer» C. \[\frac{(r+2)(r+3)}{2}{{x}^{r}}\]


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