1个回答
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(1)(
-1)2,
=
2-2×
×1+1,
=3-2
+1,
=4-2
;
(2)
+(-1)3-2×
,
=2
-1-2×
3 |
=
3 |
3 |
=3-2
3 |
=4-2
3 |
(2)
8 |
|
=2
2 |
|