作业帮2/(x-1)-2/(x+1)-1/(x-2)+1/(x+2)=?
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/27 13:35:41
2/(x-1)-2/(x+1)-1/(x-2)+1/(x+2)=?
2/(x-1)-2/(x+1)-1/(x-2)+1/(x+2)=?
2/(x-1)-2/(x+1)-1/(x-2)+1/(x+2)=?
2/(x-1)-2/(x+1)-1/(x-2)+1/(x+2)
=(2x+2-2x+2)/(x+1)(x-1)-(x+2-x+2)/(x+2)(x-2)
=4/(x+1)(x-1)-4/(x+2)(x-2)
=4(x²-4-x²+1)/(x+1)(x-1)(x+2)(x-2)
=-12/(x+1)(x-1)(x+2)(x-2)
或=-12/(x²-1)(x²-4)
=-12/(x^4-5x²+4)
答：
通分即可
原式
=2[x+1-(x-1)]/(x²-1)-[x+2-(x-2)]/(x²-4)
=4/(x²-1)-4/(x²-4)
=4[x²-4-(x²-1)]/[(x²-4)(x²-1)]
=-12/(x^4-5x²+4)
=2（x+1)-2(x-1))/(x+1)(x-1)+(-2(x+2)+2(x-2))/(x+2)(x-2)
=4(x2-4)-6(x2-1))/(x2-1)(x2-4)
=(-2(x2+5))/(x2-1)(x2-4)
-12/[（x-1)(x+1)(x-2)(x+2)]
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
七年级下册政治复习提纲(山东人民出版社)第五单元是 青春的脚步 青春的气息别弄错了啊!格式：X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X X.
分解因式----（X*X-X)(X*X-X-2)+1
】x(x+1)+x^2(x-1)
1/(1-x)+1/(1+x)+2/(1+x*x)+4/(1+x*x*x*x)+8/(1-x*x*x*x*x*x*x*x)怎么做
x-1/x-2
{2X+1}+{X}
(x^2-1)/x
x^2-1/x
2X+|X+1|
｜x-1｜+｜x-2｜
(x+1)/(x+2)
/X+1/+/X+2/
2x/(1-x)
|X+2|+|X-1|
2x-1 (x
|x-2|+|x-1|