Duration: 3:35

0 views

0

The coefficient of \( x^{r} \) in the expression of \( (1-2 x)^{-1 / 2} \) is
(1) \( \frac{(2 r) !}{(r !)^{2}} \)
(2) \( \frac{(2 r) !}{2^{r}(r !)^{2}} \)
(3) \( \frac{(2 r) !}{(r !)^{2} 2^{2 r}} \)
(4) \( \frac{(2 r) !}{2^{r}(r+1) !(r-1) !} \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live