3 Answers
sanchit
·2010-05-11 10:47:57
hope u can see it::::
for any indexx
(1+x)^{1/2}=1+\frac{1}{2}x+ \frac{(1/2)(1/2-1))}{2!}x+.......nd..soo..on
T_{r}=\frac{n(n-1)(n-2)(n-3)...(n-r+1)x^r}{r!}