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已知两条曲线与在点处的切线平行,则的值为 ( ) A.0 B. C.0或 D.0...

已知两条曲线说明: 6ec8aac122bd4f6e说明: 6ec8aac122bd4f6e在点说明: 6ec8aac122bd4f6e处的切线平行,则说明: 6ec8aac122bd4f6e的值为      (  )

A.0                    B.说明: 6ec8aac122bd4f6e                       C.0或说明: 6ec8aac122bd4f6e                D.0或1

 

C 【解析】略
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