题目内容
如果a,b是任意两个不等于零的数,定义运算⊕如下(其余符号意义如常):a⊕b=
,那么[(1⊕2)⊕3]-[1⊕(2⊕3)]的值是
______.
| a2 |
| b |
[(1⊕2)⊕3]-[1⊕(2⊕3)]=
⊕3-1⊕
=
÷3-
=-
.
| 1 |
| 2 |
| 22 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 3 |
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| a2 |
| b |
| 1 |
| 2 |
| 22 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 3 |