A.a2+a3=a5 | B.a2•a3=a6 | C.a4÷a3=1 | D.(a2)4=a8 |
A.a2+a2=a4 | B.a6÷a3=a2 | C.a2•a3=a5 | D.3a+2b=5ab |
A.x2•x3=2x6 | B.x3•(3x)2=9x5 | C.x5÷x=2x5 | D.(-2x3)2=-8x6 |
1 |
2 |
A.1010÷105=100 |
B.xn÷xn-3=x3 |
C.如果2m÷2n=16,那么n-m=4 |
D.t18÷t18=0 |
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