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<b>let </b><font color="Maroon">n</font> be    <a href="subset_1.html#M2">Element</a> of  <a href="numbers.html#K5">NAT</a> ;<br/>

<b>assume </b><a NAME="E1:8"/><i><font color="Green">E31</font></i>: 
<font color="Maroon">n</font> <a href="xxreal_0.html#NR2" target="_self">&gt;=</a> 1
 ;<br/>

<b>hence </b><font color="Maroon">n</font> <a href="power.html#K2" target="_self">-root</a> 1 = 
<font color="Maroon">n</font> <a href="prepower.html#K5">-Root</a> 1
<b>by </b><i/>
<br/>.= 
1
<b>by </b><i>, <a class="ref" href="prepower.html#T29">PREPOWER:29</a></i>
;<br/><br/>


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