（1)(5-x)/(x-4)+1/(4-x)=1(2)1/(x^3+2x^2+x) + 1/(x^2+2x+1) =5/(2^2+2x)（3)（1-x）/(1+x+x^2) + 6/(1-x)=7/(1-x)(4)52/(x-8)=48/x + 4/(x-26)

来源：学生作业帮助网 编辑：作业帮 时间：2024/11/26 06:31:27
（1)(5-x)/(x-4)+1/(4-x)=1(2)1/(x^3+2x^2+x) + 1/(x^2+2x+1) =5/(2^2+2x)（3)（1-x）/(1+x+x^2) + 6/(1-x)=7/(1-x)(4)52/(x-8)=48/x + 4/(x-26)
xVNA~aX;;txj`eA%!F(@ EEv媯?=I0Ѧncnvoت;&c1kQ kMJF)@\xݱ0cD [pG3`ҤӸq3&IP~Lxl+.Se.  bIHЁm|ڤz%xuaeɰ{~/^joraP%a Am E5yg^fgXv_xQԵ n{IB[HBN3PkҬI% P&0( yJ1&k9zw!13 .ƥE(]6Ɯ0M5KR<_(\3AhDY"%@difdԡ_hhx` أߥb;ܛ5RPFd6F|IJ$)O1 JMW>*s“1<۩ h7ｰ G{7o2*&8ÌUHP:rWkfZ\(SSSUʼn/GG]-i&E*+W2C&FoK:kJS!WJqG0$@ I2>F.Nto4 KoC"nd(BB'-á)C(:r ҟLN}@{Qxr9O̬>9Zrԯ? `^?=o-\1O8A

（1)(5-x)/(x-4)+1/(4-x)=1(2)1/(x^3+2x^2+x) + 1/(x^2+2x+1) =5/(2^2+2x)（3)（1-x）/(1+x+x^2) + 6/(1-x)=7/(1-x)(4)52/(x-8)=48/x + 4/(x-26)
（1)(5-x)/(x-4)+1/(4-x)=1
(2)1/(x^3+2x^2+x) + 1/(x^2+2x+1) =5/(2^2+2x)
（3)（1-x）/(1+x+x^2) + 6/(1-x)=7/(1-x)
(4)52/(x-8)=48/x + 4/(x-26)

（1)(5-x)/(x-4)+1/(4-x)=1(2)1/(x^3+2x^2+x) + 1/(x^2+2x+1) =5/(2^2+2x)（3)（1-x）/(1+x+x^2) + 6/(1-x)=7/(1-x)(4)52/(x-8)=48/x + 4/(x-26)
解（5-x)/(x-4)+1/(4-x)=1
(5-x)/(x-4)-1/(x-4)=1
(5-x)/(x-4)*（X-4）-1/(x-4)*（X-4）=1
5-x-1=x-4
2x=8
x=4
经检验,x=4,为增根
所以方程无解
(2) 1/x(x+1)^2+1/(x+1)^2=5/2x(x+1)
1/x(x+1)^2*2x(x+1)^2+1/(x+1)^2*2x(x+1)^2=5/2x(x+1)*2x(x+1)^2
2+2x=5(x+1)
2+2x=5x+5
3x=-3
x=-1
经检验x=-1是增根
所以方程无解
(3)
(1-x)^2/(1+x+x^2)=1
x^2+x+1=x^2-2x+1
x+1=-2x+1
x=0
经检验X=0为原方程的根
(4)52/(x-8)=48/x + 4/(x-26)
52/(x-8)*x(x-8)(x-26) =48/x*x(x-8)(x-26) + 4/(x-26)*x(x-8)(x-26)
52x(x-26)=48(x-8)(x-26)+4x(x-8)
13x(x-26)=12(x-8)(x-26)+x(x-8)
13x^2-338x=12(x^2-34x+208)+(x^2-8x)
13x^2-338x=12x^2-408x+2496+x^2-8x
-338x=-408x+2496-8x
408x+8x-338x=2496
78x=2496
x=32
经检验,x=32是原方程的根

(5-x)/(x-4)+1/(4-x)=1
解 5-x-1/x-4=1
5-x-1=x-4
2x=8
x=4
经检验 X=4为原方程的增根
剩下的叫别人帮你

(1)
(5-x)/(x-4)+1/(4-x)=1
(5-x)/(x-4)-1/(x-4)=1
两边乘x-4
5-x-1=x-4
2x=8
x=4
分式方程要检验
经检验，x=4使分母为0，是增根，舍去
所以方程无解
(2)
1/x(x+1)^2+1/(x+1)^2=5/2x(x+1)

全部展开

(1)
(5-x)/(x-4)+1/(4-x)=1
(5-x)/(x-4)-1/(x-4)=1
两边乘x-4
5-x-1=x-4
2x=8
x=4
分式方程要检验
经检验，x=4使分母为0，是增根，舍去
所以方程无解
(2)
1/x(x+1)^2+1/(x+1)^2=5/2x(x+1)
两边乘2x(x+1)^2
2+2x=5(x+1)
2+2x=5x+5
3x=-3
x=-1
x=-1使公分母2x(x+1)^2=0
是增根，舍去
所以方程无解
(3)
(1-x)^2/(1+x+x^2)=1
x^2+x+1=x^2-2x+1
x+1=-2x+1
x=0
(4)
两边乘x(x-8)(x-26)
52x(x-26)=48(x-8)(x-26)+4x(x-8)
13x(x-26)=12(x-8)(x-26)+x(x-8)
13x^2-338x=12(x^2-34x+208)+(x^2-8x)
13x^2-338x=12x^2-408x+2496+x^2-8x
-338x=-408x+2496-8x
408x+8x-338x=2496
78x=2496
x=32
经检验，x=32是方程的解

收起

（5-X)/(X-4)-1/(X-4)=1
(5-X-1)/(X-4)=1
4-X=X-4
X=2

1:原式=（5-x)/(x-4)+1/(x-4)=1
两边同乘以(x-4)
5-x-1=x-4
5-x-1-x+4=0
8-2x=0
8=2x
x=4
经检验：x=4是原方程的增根
∴原方程无解
2、符号看不懂，是平方吗？
3、同2
4、不知道。。。。

*-----------------------------------------------*| 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 || x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 x^5-x^4+x^3-x^2+x-1 x^6-x^5+x^4-x^2+x-1 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X 难倒爱因斯坦的九宫格X 7 X | X 8 1 | X X X |X X X | X 4 X | 7 5 9 |X X 5 | 7 X 9 | X 1 4 |5 X X | X X 8 | 3 9 X |3 9 6 | 4 X 7 | X X 2 |X 8 7 | 9 X X | X X X |4 X X | 6 X 5 | X X X | X X 4 | X X 1 |2 X X | X X X | X X X | X 3 X | X X X |X 6 如下9*9宫图如何填x x x 1 x x x 2 9x x 5 x x x x x 4x 6 8 x x x x x xx x x 7 x x 5 x xx 2 x x 6 x x 8 xx x 3 x x 9 x x xx x x x 5 x 1 6 x 4 x x x 3 x x x x 7 x x x x 2 x x x 解九宫格题目（X为未知数）9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 x-1分之x²+5x - x²-x分之2x²+4x (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x 提取公因式:已知x*x-5x+1=0 求x*x*x-4x*x-4x-1 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4 [(x+2)/(x+3)-(x+1)/(x+2)+(x+4)/(x+5)-(x+3)/(x+4)]/[(x的平方+7x+13)/(x的平方+8x+15)] 计算:[(x+2)/(x+3) - (x+1)/(x+2) + (x+4)/(x+5) - (x+3)/(x+4) / (x^2 + 7x + 13)/(x^2 + 8x + 15) 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 解决数独问题x 1 x 7 x x x 3 xx x x x 4 x 2 x x9 x 3 6 x 8 7 x 58 x x x x 9 x x xx x 2 x 5 x x x 4x 3 x x x x 6 x xx x x x x x x x 26 x x x x x x x 7x 5 4 1 7 x 9 8 x这道题我用了很多办法都没有头绪,请帮忙的朋友把解题的思