高中数学代数与函数一函数练习题82
题目内容

对于函数 f( x),若在其定义域内存在两个实数 a, b( a< b),使当 x∈[ a, b]时, f( x)的值域也是[ a, b],则称函数 f( x)为“科比函数”. http://picflow.koolearn.com/upload/2010-11/09/eb9822c0-1a0b-4859-b1c6-f3f7733b9cd4/paper.files/image073.jpghttp://picflow.koolearn.com/upload/2010-11/09/eb9822c0-1a0b-4859-b1c6-f3f7733b9cd4/paper.files/image073.jpg若函数 http://picflow.koolearn.com/upload/2010-11/09/eb9822c0-1a0b-4859-b1c6-f3f7733b9cd4/paper.files/image074.gif是“科比函数”,则实数 k的取值范围(  )

2021-08-04

A.http://picflow.koolearn.com/upload/2010-11/09/eb9822c0-1a0b-4859-b1c6-f3f7733b9cd4/paper.files/image075.gif

B.http://picflow.koolearn.com/upload/2010-11/09/eb9822c0-1a0b-4859-b1c6-f3f7733b9cd4/paper.files/image076.gif

C.http://picflow.koolearn.com/upload/2010-11/09/eb9822c0-1a0b-4859-b1c6-f3f7733b9cd4/paper.files/image077.gif

D.http://picflow.koolearn.com/upload/2010-11/09/eb9822c0-1a0b-4859-b1c6-f3f7733b9cd4/paper.files/image078.gif

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