4 |
x-1 |
A.x=2 | B.x=-2 | C.x=-1 | D.x=3 |
1 |
x+1 |
4 |
x2-1 |
n |
x-1 |
m |
x-2 |
A.1 | B.2 | C.1或2 | D.-1或2 |
1 |
x-1 |
2 |
x |
A.0 | B.1 | C.2 | D.3 |
x |
x-2 |
3 |
x-2 |
A.x=2+3 | B.x=2(x-2)+3 |
C.x(x-2)=2+3(x-2) | D.x=3(x-2)+2 |
3 |
2x-4 |
1 |
x |
A.2x(x-2) | B.x | C.x-2 | D.2x-4 |
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