摘要: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}
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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 ( )
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.{,2,4} | D.{,1,2,4,8} |