題目列表(包括答案和解析)
若函數(shù)f(x) = +
2x + log2x的值域是 {3,
-1, 5 +
, 20},
則其定義域是 ( )
(A) {0,1,2,4} (B) {,1,2,4} (C) {
,2,4} (D)
{
,1,2,4,8}
A.{0,1,2,4} | B.{![]() | C.{![]() | D.{![]() |
若函數(shù)f(x) = + 2x + log2x的值域是 {3,
-1, 5 +
, 20},
則其定義域是 ( )
A.{0,1,2,4} | B.{![]() | C.{![]() | D.{![]() |
若函數(shù)f(x) = + 2x + log2x的值域是 {3,
-1, 5 +
,
20},則其定義域是( )
A.{0,1,2,4}
B.{,1,2,4}
C.{-,1,2,4} D.{
,1,2,4}
若函數(shù)f(x)=+2x+log2x的值域是{3,
-1,5+
,20},則其定義域是
A.{0,1,2,4}
B.{,1,2,4}
C.{,2,4}
D.{,1,2,4,8}
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