初二1找规律题方程(1/x+1)-(1/x)=(1/x-2)-(1/x-3)的解...

初二1找规律题 方程(1/x+1)-(1/x)=(1/x-2)-(1/x-3)的解x=1 方程(1/x)-(1/x-1)=(1/x-3)-(1/x-4)的解x=2 方程(1/x-1)-(1/x-2)=(1/x-4)-(1/x-5)的解x=3. 写出能反映上述方程一般规律的方程,并直接写出这个方程的解.

第1个回答  2020-07-05
规律:1/(x-n)-1/[x-(n+1)]=1/[x-(n+3)]-1/[x-(n+4)]
方程的解是:x=n+2
解法如下:[x-(n+1)-(x-n)]/[x-n][x-(n+1)]=[x-(n+4)-x+(n+3)]/[x-(n+3)][x-(n+4)]
-1/[x-n][x-n-1]=-1/[x-n-4][x-n-3]
[x-n][x-n-1]=[x-n-4][x-n-3]
x^2-(2n+1)x+n(n+1)=x^2-(2n+7)x+(n+4)(n+3)
[-2n-1+2n+7]x=n^2+7n+12-n^2-n
6x=12+6n
x=n+2

初二1找规律题方程(1\/x+1)-(1\/x)=(1\/x-2)-(1\/x-3)的解...
规律:1\/(x-n)-1\/[x-(n+1)]=1\/[x-(n+3)]-1\/[x-(n+4)]方程的解是:x=n+2 解法如下:[x-(n+1)-(x-n)]\/[x-n][x-(n+1)]=[x-(n+4)-x+(n+3)]\/[x-(n+3)][x-(n+4)]-1\/[x-n][x-n-1]=-1\/[x-n-4][x-n-3][x-n][x-n-1]=[x-n-4][x...

阅读下列材料:方程1\/(x+1)-1\/x=1\/(x-2)-1\/(x-3)的解为x=1
一般规律方程1\/(x-n+2)-1\/(x-n+1)=1\/(x-n-1)-1\/(x-n-2)方程的解为x=n 1\/(x-2011)-1\/(x-2012)=1\/(x-2014)-1\/(x-2015)

已知方程1\/(x+1)-1\/x=1\/(x-2)-1\/(x-3),1\/x-1\/(x-1)=1\/(x-3)-1\/(x...
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(1\/x+1-1\/1-x) 怎么解?
答案是:2X \/(X²-1)解题思路:1\/(x+1)-1\/(1-x)=1\/(x+1)+1\/(x-1)=(x-1)\/((x+1)(x-1)) + (x+1)\/((x+1)(x-1))\\ =((x-1)+ (x+1))\/((x+1)(x-1))=2x\/((x+1)(x-1))=2x\/(x^2-1)

一.解方程: (1).1\/x-1=1\/x²-1 (2).(1\/x-2)+3=x-1\/x-2 (3).2-x\/...
一.解方程:(1).1\/x-1=1\/x²-1 1\/(x-1)=1\/[(x+1)(x-1)]x不等1 x+1=1 x=0 (2).(1\/x-2)+3=x-1\/x-2 1+3x-6=x-1 2x=4 x=2 (3).2-x\/3+x=1\/2+1\/x+3 2-x=(x+3)\/2+1 3x\/2=-1\/2 x=-1\/3 二.(1).已知m\/n=5\/3,求(m\/m+n)+(m...

1\/[x(x+1)]=1\/x-1\/(x+1) 是怎么算出来的啊 是不是有什么公式 或者步骤...
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1\/(x-1)+1\/(x-4)=1\/(x-2)+1\/(x-3)
解: 1\/(x-1)+1\/(x-4)=1\/(x-2)+1\/(x-3)(x-4+x-1)\/(x-1)(x-4)=(x-3+x-2)\/(x-2)(x-3)(2x-5)\/(x-1)(x-4)=(2x-5)\/(x-2)(x-3)因为(x-1)(x-4)=x^2-5x+4 (x-2)(x-3)=x^2-5x+6 所以 (x-1)(x-4)不等于(x-2)(x-3)因此 只有2x-5=0...

计算1\/x-1+1\/(x-1)(x-2)+1\/(x-2)(x-3)
楼主你这个体前面应该是1\/(x-1)吧?,因为这里打字不像说在纸上那样看得清楚你这样写很容易给人看成是1\/x去减1的,请注意一下,谢谢 原式=1\/(x-1) + 1\/(x-1) - 1\/(x-2) + 1\/(x-2) - 1\/(x-3) =1\/(x-1) + 1\/(x-1) -1\/(x-3) =(x-5)\/(x-1)(x-3...

解分式方程1\/(x-1)=1\/(x²-1)、(1\/(x-2))+3=(1-x)\/(2-x)
-1)1\/(x-1)=1\/(x+1)(x-1)两边乘(x+1)(x-1)x+1=1 x=0 经检验,x=0是方程的解 (1\/(x-2))+3=(1-x)\/(2-x)1\/(x-2)+3=(x-1)\/(x-2)两边乘x-2 1+3(x-2)=x-1 3x-5=x-1 2x=4 x=2 经检验,x=2时分母x-2=0 是增根,舍去 方程无解 ...

2\/x+3=1\/x-2解方程?
2\/x+3=1\/x-2 2\/x-1\/x=-3-2 1\/x=-5 -5x=1 x=-1\/5 方程的解是x等于-1\/5

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