2 |
x |
1 |
3 |
x2+4 |
2 |
4ab |
π |
3 |
a+b |
1 |
m |
A.2个 | B.3个 | C.4个 | D.5个 |
1 |
3 |
x2+4 |
2 |
4ab |
π |
2 |
x |
3 |
a+b |
1 |
m |
1 |
a-2 |
A.a<1 | B.3 | C.0 | D.1 |
m+2 |
(m-2)(m+3) |
x2-4 |
x-2 |
A.x=±2 | B.x=2 | C.x=-2 | D.x=
|
1 |
x |
3xy |
π |
3 |
x+y |
a-b |
2 |
a+b |
a-b |
A.2个 | B.3个 | C.4个 | D.5个 |
x2-9 |
x2+x-6 |
A.3 | B.-3或2 | C.±3 | D.-3 |
© 2017-2019 超级试练试题库,All Rights Reserved.