1/16:0,125 0,125=1/8
1/16:1/8
1/16×8/1=1/2
<span> Используя полученное равенство </span><span> <span>a 0</span> = 1 </span><span>, выясним значение </span><span>степени
с отрицательным показателем:
<span>a m</span> • <span>a <span>–m</span></span> = <span>a <span>m+<span>(<span>–m</span>)</span></span></span> = <span>a <span>m−m</span></span> = <span>a 0</span> = 1 </span><span>; </span>
<span> значит, </span><span> <span>a m</span> • <span>a <span>(<span>–m</span>)</span></span> = 1 </span><span>; </span>
<span> выразим </span><span> <span>a <span>–m</span></span> </span><span>, </span><span> <span>a <span>–m</span></span> = <span>1<span>a m</span></span> = <span><span>( <span>1a</span>)</span> m</span> </span><span> при </span><span> <span>a≠0</span> </span><span> . </span>