A) \[x:a\]
B) \[n:r\]
C) \[x:n\]
D) None of these
Correct Answer: D
Solution :
Ratio of coefficient of \[{{x}^{n-r}}{{a}^{r}}\]and \[{{x}^{r}}{{a}^{n-r}}\]is = \[\frac{^{n}{{C}_{r}}}{^{n}{{C}_{n-r}}}=\frac{^{n}{{C}_{r}}}{^{n}{{C}_{r}}}=\frac{1}{1}\]You need to login to perform this action.
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