4.若函数f(x) = + 2x + log2x的值域是 {3, -1, 5 + , 20}.则其定义域是 {0.1.2.4} {.2.4} (D) {.1.2.4.8} 查看更多

 

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若函数f(x) = + 2x + log2x的值域是 {3, -1, 5 + , 20},

 

则其定义域是                                       (     )

(A) {0,1,2,4}    (B) {,1,2,4}   (C) {,2,4}  (D) {,1,2,4,8}

 

 

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若函数f(x) = + 2x + log2x的值域是 {3, -1, 5 + , 20},
则其定义域是                                       (     )
A.{0,1,2,4}B.{,1,2,4}C.{,2,4}D.{,1,2,4,8}

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若函数f(x) = + 2x + log2x的值域是 {3, -1, 5 + , 20},
则其定义域是                                       (     )

A.{0,1,2,4} B.{,1,2,4} C.{,2,4} D.{,1,2,4,8}

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 若函数f(x) = + 2x + log2x的值域是 {3,-1, 5 +, 20},则其定义域是(    )

    A.{0,1,2,4}         B.{,1,2,4}   

    C.{-,1,2,4}      D.{,1,2,4}

 

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若函数f(x)=+2x+log2x的值域是{3,-1,5+,20},则其定义域是

[  ]

A.{0,1,2,4}

B.{,1,2,4}

C.{,2,4}

D.{,1,2,4,8}

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