题目列表(包括答案和解析)
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}
A.{0,1,2,4} | B.{,1,2,4} | C.{,2,4} | D.{,1,2,4,8} |
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} |
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}
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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