二項定理
二項定理[binomial theorem]
$n=1,2,\cdots$に対して，\[(a+b)^{n}=_{n}C_{0}a^{n}+_{n}C_{1}a^{n-1}b+_{n}C_{2}a^{n-2}b^{2}+ \cdots +_{n}C_{n}b^{n}\]
Mathematics is the language with which God has written the universe.
