高数自考,急求大家赐教
<P>P{1.9《1/<EM>σ</EM><SPAN style="FONT-SIZE: 9pt"><SUP>2 </SUP><STRONG>Σ</STRONG><SUP>（X-U）^2</SUP>《37.6}</SPAN></P><P><SPAN style="FONT-SIZE: 9pt"></SPAN> </P>
<P><SPAN style="FONT-SIZE: 9pt"></SPAN> </P>
<P><SPAN style="FONT-SIZE: 9pt">好心人也可回复到QQ:573508871谢谢</SPAN></P>
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