题目内容
2[
x-(
x-
)]-
x.
| 4 |
| 3 |
| 2 |
| 3 |
| 1 |
| 2 |
| 3 |
| 4 |
原式=2[
x-
x+
]-
x
=2[
x+
]-
x
=
x+1-
x
=
x-
x+1
=
x+1.
| 4 |
| 3 |
| 2 |
| 3 |
| 1 |
| 2 |
| 3 |
| 4 |
=2[
| 2 |
| 3 |
| 1 |
| 2 |
| 3 |
| 4 |
=
| 4 |
| 3 |
| 3 |
| 4 |
=
| 16 |
| 12 |
| 9 |
| 12 |
=
| 7 |
| 12 |
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