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<b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ;<br/>

<b>assume </b><a NAME="E1:12"/>
<font color="Maroon">x</font> is   <a href="rat_1.html#NM1">Rational</a>
 ;<br/>

<a NAME="E2:12"/><b>then </b>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="numbers.html#K3">RAT</a> 
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:12"/>
 ex <font color="Olive">m</font>, <font color="Olive">n</font> being  <a href="int_1.html#NM1">Integer</a> st <br/>( <font color="Olive">n</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> 0 &amp; <font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Olive">m</font> <a href="xcmplx_0.html#K7">/</a> <font color="Olive">n</font> )
 <b>by </b><i/>;<br/>


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