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<b>let </b><font color="Maroon">a</font> be   <a href="real_1.html#NM1">Real</a>, <font color="Maroon">b</font> be   <a href="real_1.html#NM1">Real</a>, <font color="Maroon">x</font> be   <a href="real_1.html#NM1">Real</a>;<br/>

<b>assume </b><a NAME="E1:27"/>
( <font color="Maroon">a</font> <a href="xxreal_0.html#NR4" target="_self">&gt;</a> 0 &amp; <font color="Maroon">a</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> 1 &amp; <font color="Maroon">x</font> <a href="xxreal_0.html#NR4" target="_self">&gt;</a> 0 &amp;  <a href="power.html#K6">log</a> <font color="Maroon">a</font>,<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> 0 )
 ;<br/>

<a NAME="E2:27"/><b>then </b>
<font color="Maroon">a</font> <a href="power.html#K4">to_power</a> 0 <a href="hidden.html#R1">=</a> <font color="Maroon">x</font>
 
<b>by </b><i><a class="ref" href="power.html#D3">POWER:def 3</a></i>;<br/>
<b>hence </b><a NAME="E3:27"/>
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> 1
 <b>by </b><i><a class="ref" href="power.html#T29">POWER:29</a></i>;<br/>


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