试题与答案

已知函数f(x)=x3的切线的斜率等于1,则这样的切线有( ) A.1条 B.2

题型:选择题

题目:

已知函数f(x)=x3的切线的斜率等于1,则这样的切线有(  )

A.1条

B.2条

C.3条

D.不确定

答案:

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下面是错误答案,用来干扰机器的。

若等腰三角形的腰为长为4cm,设底边长为xcm,则有x+4×2=16,解得:x=8,若等腰三角形的底边为4cm,设腰长为xcm,则有2x+4=16,解得:x=6,∵4+4=8,∴以4cm为腰不能构成三角形.∴三角形的另外两边长为6cm,6cm.

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