A.x2(m+1)÷xm+1=x2 | B.(xy)8÷(xy)4=(xy)2 |
C.x10÷(x7÷x2)=x5 | D.x4n÷x2n•x2n=1 |
A.4xn+2(-
| ||
B.(-2an)2•(3a2)3=108a2n+6 | ||
C.(x4y+6x3y2-x2y2)÷(3x2y)=3x2+2xy-3x | ||
D.(3xn+1-2xn)•5x=15xn+2-10xn+1 |
3 |
4 |
1 |
2 |
1 |
4 |
1 |
2 |
A.(a-b)2=a2-b2 | B.(2x)3÷x=8x2 | C.a÷a•
| D.
|
A.
| B.
| ||||||||
C.a2+ab+b2=(a+b)2 | D.
|
© 2017-2019 超级试练试题库,All Rights Reserved.