1 |
x-2 |
1-x |
2-x |
A.x=1 | B.x=2 | C.x=-2 | D.此方程无解 |
x |
x+1 |
2x |
3x+3 |
3 |
x-1 |
x+2 |
x(x-1) |
2-x |
x-3 |
1 |
3-x |
3 |
x(x+3) |
1 |
x+3 |
A.x1=1,x2=-3 | B.x1=-1,x2=3 | C.x=1 | D.x=-3 |
6 |
x2-1 |
3 |
x-1 |
A.x=1 | B.x=-4 |
C.x1=1,x2=-4 | D.以上答案都不对 |
x |
x-4 |
a |
x-4 |
A.a>4 | B.a>8 | C.a<4 | D.a<8且a≠4 |
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