题目内容
y=
(x≥0)的值域为______.
| 2x-1 |
| 3x+2 |
函数y=
(x≥0)=
=
-
由x≥0,得3x+2≥2,得0<
≤
∴-
≤
-
<
故函数的值域为[-
,
)
| 2x-1 |
| 3x+2 |
| ||||
| 3x+2 |
| 2 |
| 3 |
| 7 |
| 3(3x+2) |
由x≥0,得3x+2≥2,得0<
| 7 |
| 3(3x+2) |
| 7 |
| 6 |
∴-
| 1 |
| 2 |
| 2 |
| 3 |
| 7 |
| 3(3x+2) |
| 2 |
| 3 |
故函数的值域为[-
| 1 |
| 2 |
| 2 |
| 3 |
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