(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 |
|x|-1 |
x+1 |
A.x=-1 | B.x=0 | C.x=1 | D.x=±1 |
|x|-2 |
x2-4 |
A.2 | B.-2 | C.±2 | D.不存在 |
© 2017-2019 超级试练试题库,All Rights Reserved.