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<b>take </b>
 <a href="xxreal_0.html#K2" target="_self">-infty</a> 
;<br/>

<b>thus </b><a NAME="E1:28_2_1"/>
 <a href="xxreal_0.html#K2" target="_self">-infty</a>  is <a href="xxreal_0.html#V3" target="_self">negative</a>
 ;<br/>


</div>
