指数法則

\[a^{m}a^{n}=a^{m+n},(a^m)^n=a^{mn},(ab)^n=a^nb^n \]

加法
\[1a=a ,na=(n-1)a+a (n=2,3,4,...)\]

乗法
\[a^{1}=a,a^{n}=a^{n-1}=a^{n-1}\times a (n=2,3,4,...)\]

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