2 |
3 |
5 |
6 |
1 |
2 |
1 |
3 |
2 |
3 |
5 |
6 |
2 |
3 |
5 |
6 |
5 |
9 |
1 |
2 |
1 |
8 |
3 |
2 |
1 |
3 |
1 |
3 |
A.3x2-x+2的一次项系数为1 |
B.xyz的系数为0 |
C.a2b3c是五次单项式 |
D.x5+3x2y4-xy-2n5是六次四项式 |
A.2a2+5a3=7a5 | B.7t2-t2=7 |
C.4x•5y=20xy | D.2x2y÷2xy2=xy |
A.(x2)3-2(x3)2=-x12 | B.(3a2b2)•(2ab)3=6a3b2 |
C.(-a4)•(-ax)2=-a6x2 | D.(-xy2)2•(xyz)=x3y5 |
1 |
2 |
A.4a3 | B.-a3 | C.-a | D.-
|
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