3x+4 |
x2−1 |
2 |
x−1 |
x+2 |
x2−2x+1 |
=[
3x+4 |
(x+1)(x−1) |
2(x+1) |
(x+1)(x−1) |
(x−1)2 |
x+2 |
=
3x+4−2x−2 |
(x+1)(x−1) |
(x−1)2 |
x+2 |
=
x+2 |
(x+1)(x−1) |
(x−1)2 |
x+2 |
=
x−1 |
x+1 |
又
|
由①解得:x>-4,
由②解得:x<-2,
∴不等式组的解集为-4<x<-2,
其整数解为-3,
当x=-3时,原式=
−3−1 |
−3+1 |
3x+4 |
x2−1 |
2 |
x−1 |
x+2 |
x2−2x+1 |
|
3x+4 |
x2−1 |
2 |
x−1 |
x+2 |
x2−2x+1 |
3x+4 |
(x+1)(x−1) |
2(x+1) |
(x+1)(x−1) |
(x−1)2 |
x+2 |
3x+4−2x−2 |
(x+1)(x−1) |
(x−1)2 |
x+2 |
x+2 |
(x+1)(x−1) |
(x−1)2 |
x+2 |
x−1 |
x+1 |
|
−3−1 |
−3+1 |