antilysin 发表于 2006-11-14 12:45

first principle question

<p>how do u prove limx-&gt;0 (sinx)/x=1 from first principle?</p><p>btw: first principle = limh-&gt;0 /h</p>

xjzkp 发表于 2006-12-1 13:58

<p>能说得具体点吗、</p>
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