题目
题型:解答题难度:一般来源:不详
2 |
x+3 |
2 |
3-x |
2x+18 |
x2-9 |
答案
2 |
x+3 |
2 |
3-x |
2x+18 |
x2-9 |
-2x+6 |
x2-9 |
2 |
x-3 |
∵x为整数且
2 |
x-3 |
∴x-3=±2或±1,
则x=5或1或4或2.
则所有符合条件的x值的和为12.
故答案为12.
核心考点
举一反三
1 |
b |
1 |
c |
1 |
a |
1 |
c |
1 |
a |
1 |
b |
x-y |
x+y |
2x+1 |
(x-1)(x+2) |
A |
x-1 |
B |
x+2 |
2 |
x+3 |
2 |
3-x |
2x+18 |
x2-9 |
2 |
x+3 |
2 |
3-x |
2x+18 |
x2-9 |
-2x+6 |
x2-9 |
2 |
x-3 |
2 |
x-3 |
1 |
b |
1 |
c |
1 |
a |
1 |
c |
1 |
a |
1 |
b |
x-y |
x+y |
2x+1 |
(x-1)(x+2) |
A |
x-1 |
B |
x+2 |