x+3 |
x-3 |
x+2 |
x-4 |
A.x≠3且x≠-2 | B.x≠3且x≠4 |
C.x≠3且x≠-3 | D.x≠-2且x≠3且x≠4 |
x2-7x+12 |
x2-9 |
A.3或4 | B.-3或-4 | C.3 | D.4 |
(x+1)(x-2) |
|x|-1 |
A.x=2或x=-1 | B.x=-1 | C.x=±1 | D.x=2 |
|x|-5 |
x2+5x |
A.0 | B.5 | C.-5 | D.±5 |
|x|-1 |
x+1 |
A.x=-1 | B.x=1 |
C.x=-1或x=1 | D.x为任何实数 |
2x-10 |
x-5 |
A.x=5 | B.x≠5 | C.无解 | D.以上都不对 |
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