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<b>let </b><font color="Maroon">x</font> be   <a href="supinf_1.html#NM3">R_eal</a>, <font color="Maroon">y</font> be   <a href="supinf_1.html#NM3">R_eal</a>;<br/>

<b>assume </b><a NAME="E1:26"/><i><font color="Green">E19</font></i>: 
<font color="Maroon">y</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="supinf_2.html#K1">0.</a> 
 ;<br/>

<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>;<br/>

<b>assume </b><a NAME="E2:26"/><i><font color="Green">E20</font></i>: 
( <font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a</font> &amp; <font color="Maroon">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">b</font> )
 ;<br/>

<b>consider </b><font color="Maroon">a1</font> being   <a href="real_1.html#NM1">Real</a>, <font color="Maroon">b1</font> being   <a href="real_1.html#NM1">Real</a><b> such that </b><br/><a NAME="E4:26"/><i><font color="Green">E25</font></i>: 
( <font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a1</font> &amp; <font color="Maroon">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">b1</font> &amp; <font color="Maroon">x</font> <a href="extreal1.html#K3" target="_self">/</a> <font color="Maroon">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a1</font> <a href="real_1.html#K6">/</a> <font color="Maroon">b1</font> )
 <b>by </b><i>, <a class="ref" href="extreal1.html#T8" target="_self">Th8</a>, <a class="txt" href="extreal1.html#E8"><i><font color="Green">Lemma21</font></i></a></i>;<br/>
<b>thus </b><a NAME="E5:26"/>
<font color="Maroon">x</font> <a href="extreal1.html#K3" target="_self">/</a> <font color="Maroon">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a</font> <a href="real_1.html#K6">/</a> <font color="Maroon">b</font>
 <b>by </b><i><a class="ref" href="extreal1.html#T8" target="_self">Th8</a>, <a class="txt" href="extreal1.html#E4:26"><i><font color="Green">E25</font></i></a></i>;<br/>


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