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请教一题
<m:math display=\'block\'>
<m:semantics>
<m:mrow>
<m:mstyle displaystyle=\'true\'>
<m:munderover>
<m:mo>∏</m:mo>
<m:mrow>
<m:mi>n</m:mi><m:mo>=</m:mo><m:mn>1</m:mn>
</m:mrow>
<m:mi>∞</m:mi>
</m:munderover>
<m:mrow>
<m:mrow><m:mo>(</m:mo>
<m:mrow>
<m:mn>1</m:mn><m:mo>−</m:mo><m:mfrac>
<m:mn>1</m:mn>
<m:mrow>
<m:msup>
<m:mn>2</m:mn>
<m:mi>n</m:mi>
</m:msup>
</m:mrow>
</m:mfrac>
</m:mrow>
<m:mo>)</m:mo></m:mrow>
</m:mrow>
</m:mstyle>
</m:mrow>
<m:annotation encoding=\'MathType-MTEF\'>
MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbWexLMBbXgBd9gzLbvyNv2CaeHbl7mZLdGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabauaakabbaaaaaaaacXwyJTgapeqaamaarahabaWaaeWaaeaacaaIXaGaeyOeI0YaaSaaaeaacaaIXaaabaGaaGOmamaaCaaaleqabaGaamOBaaaaaaaakiaawIcacaGLPaaaaSqaaiaad6gacqGH9aqpcaaIXaaabaGaeyOhIukaniabg+Givdaaaa@4D51@</m:annotation>
</m:semantics>
</m:math> |
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发表于 2005-2-4 00:10
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