作者JULIKEBEN (JU)
看板trans_math
标题[微分] tangent line
时间Wed Jul 2 11:00:34 2008
the length of the portion , cut off by x-axis and y-axis , of any tangent line to the curve
x^(2/3)+y^(2/3)=4 is
a.2 b.4 c.8 d.none of above
请问要怎麽下手呢??
谢谢
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