11.對任意a∈[-1,1].函數(shù)f(x)=x2+(a-4)x+4-2a的值總大于零.則x的取值范圍是 ( ) A.1<x<3 B.x<1或x>3 C.1<x<2 D.x<1或x>2 查看更多

 

題目列表(包括答案和解析)

對任意a∈[-1,1],函數(shù)f(x)=x2+(a-4)x+4-2a的值恒大于零,則x的取值范圍是 (      )

A.1<x<3 B.x<1或x>3
C.1<x<2 D.x<1或x>2

查看答案和解析>>

對任意a∈[-1,1],函數(shù)f(x)=x2+(a-4)x+4-2a的值恒大于零,則x的取值范圍是 (      )
A.1<x<3B.x<1或x>3
C.1<x<2D.x<1或x>2

查看答案和解析>>

函數(shù)f (x) = x2bxc對任意實(shí)數(shù)t,都有f (2t) = f (2t),那么   (    )

(A) f (2)f (1)f (4)   (B) f (1)f (2)f (4)

(C) f (2)f (4)f (1)   (D) f (4)f (2)f (1)

 

查看答案和解析>>

函數(shù)f (x) = x2bxc對任意實(shí)數(shù)t,都有f (2t) = f (2t),那么   (    )

(A) f (2)f (1)f (4)   (B) f (1)f (2)f (4)

(C) f (2)f (4)f (1)   (D) f (4)f (2)f (1)

 

查看答案和解析>>

函數(shù)f(x)的定義域?yàn)?i>D,若對于任意的x1、x2D,當(dāng)x1<x2時(shí),都有f(x1)≤f(x2),則稱函數(shù)f(x)在D上為非減函數(shù).設(shè)函數(shù)f(x)在[0,1]上為非減函數(shù),且滿足以下三個(gè)條件:①f(0)=0;②ff(x);③f(1-x)=1-f(x).則ff等于(  )

A.                 B.              C.1          D.

 

查看答案和解析>>


同步練習(xí)冊答案