A.-81a2b4 | B.-81a16b4 | C.81a6b4 | D.81a2b4 |
A.1是最小的自然数 |
B.平方等于它本身的数只有1 |
C.绝对值最小的数是0 |
D.倒数等于它本身的数只有1 |
A.2 | B.3 | C.3.5 | D.4 |
2 |
3 |
3 |
2 |
A.2a2+3a2=5a4 | B.a•a2•a3=a6 |
C.(-2b)2=-2b2 | D.(a2)3=a5 |
A.(2x2)3=8x6 | B.5a2b-2a2b=3 |
C.x6•x6=1 | D.x6÷x2=x3 |
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