Could you please help me in solving the following problem:
What is the value of $\displaystyle \binom {20}{0} +\binom {20}{2} +\binom {20}{4} +... \binom {20}{20}$ ?
Could you please help me in solving the following problem:
What is the value of $\displaystyle \binom {20}{0} +\binom {20}{2} +\binom {20}{4} +... \binom {20}{20}$ ?
Could you please help me in solving the following problem: What is the value of $\displaystyle \binom {20}{0} +\binom {20}{2} +\binom {20}{4} +... \binom {20}{20}$ ?
$\displaystyle \left( {x + y} \right)^n = \sum\limits_{k = 0}^n {\binom{n}{k}x^k y^{n - k} }$.
What if $\displaystyle x=1~\&~y=1~?$