题目内容
如果a、b是任意2个不等于零的数,定义运算※如下(其余符号意义如常):a※b=
,
求[1※(2※3)]-[(1※2)※3]的值.
| a2 |
| b |
求[1※(2※3)]-[(1※2)※3]的值.
∵a※b=
,
∴[1※(2※3)]-[(1※2)※3]
=1※
一
※3
=
-
×
=
-
=
.
| a2 |
| b |
∴[1※(2※3)]-[(1※2)※3]
=1※
| 4 |
| 3 |
| 1 |
| 2 |
=
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 3 |
=
| 3 |
| 4 |
| 1 |
| 12 |
=
| 2 |
| 3 |
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