题目
题型:填空题难度:一般来源:不详
2a-3b |
ab |
|
答案
2a-3b |
∴2a-3b=0,2a-b-1=0,
即
|
②-①得:2b=1,
b=
1 |
2 |
把b=
1 |
2 |
3 |
2 |
a=
3 |
4 |
∴
ab |
|
=
ab•
|
=
a2 |
=a
=
3 |
4 |
故答案为:
3 |
4 |
核心考点
举一反三
3 |
6 |
3 |
15 |
2 |
2x+y |
1 |
4 |
x+y-8 |
8-x-y |
3x-y-a |
x-2y+a+3 |
A.4 | B.5 | C.2
| D.6 |
2a-3b |
ab |
|
2a-3b |
|
1 |
2 |
1 |
2 |
3 |
2 |
3 |
4 |
ab |
|
ab•
|
a2 |
3 |
4 |
3 |
4 |
3 |
6 |
3 |
15 |
2 |
2x+y |
1 |
4 |
x+y-8 |
8-x-y |
3x-y-a |
x-2y+a+3 |
A.4 | B.5 | C.2
| D.6 |