1.
The value of is
2.
The coefficient of in the expansion of is
3.
If , then
\small (_{}^{n}\textrm{C}_{0})^2+(_{}^{n}\textrm{C}_{1})^2+(_{}^{n}\textrm{C}_{2})^2+....+(_{}^{n}\textrm{C}_{5})^2 is equal to
4.
The coefficient of in the expression is
5.
For the constant term in the expansion of
6.
\small 1+\frac{2.1}{3.2}+\frac{2.5}{3.6}(\frac{1}{2})^2+\frac{2.5.8}{3.6.9}.(\frac{1}{2})^3+... is equal to
7.
8.
If , then the value of is
9.
If denote the binomial coefficient in the expansion of then the value of is
10.
is equal to