15 |
25 |
3 |
15 |
5 |
25 |
5 |
15 |
1 |
3 |
A.
| B.
| C.
| D.
|
15 |
25 |
3 |
5 |
3 |
15 |
1 |
5 |
5 |
25 |
1 |
5 |
5 |
15 |
1 |
3 |
A.2a2•a2=2a2 | B.(2a)2=2a2 | C.a6÷a2=a3 | D.(-a2)3=-a6 |
a |
b |
A.是正数 | B.是负数 | C.是非正数 | D.是非负数 |
A.(
| B.(a3)3=a0 | C.a2•a4=a8 | D.a6÷a3=a3 |
A.x7÷x | B.x3+x3 | C.x3•x2 | D.(x3)3 |
A.a+a2=a3 | B.a•a2=a3 | C.a6÷a2=a3 | D.(3a)2=6a2 |
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