题目内容
①求函数y=
的定义域(用区间表示)
②计算:(0.0081)-
-[3×(
)0]-1•[81-0.25+(3
)-
]-
-10×(0.027)
.
| ||
| 1-|x| |
②计算:(0.0081)-
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
①函数y=
的定义域为
解得:x∈[-2,-1)∪(-1,1)∪(1,2].
②(0.0081)-
-[3×(
)0]-1•[81-0.25+(3
)-
]-
-10×(0.027)
=
-
×(
+
) -
-10×0.3
=
-
-3
=0.
| ||
| 1-|x| |
|
解得:x∈[-2,-1)∪(-1,1)∪(1,2].
②(0.0081)-
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 10 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 2 |
=
| 10 |
| 3 |
| 1 |
| 3 |
=0.
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