解方程:1\/(x-5)-1\/(x-6)=1\/(x-8)-1\/(x-9)
移项: 1\/(X-5)+1\/(X-9)=1\/(X-6)+1\/(X-8)(2X-14)\/[(X-5)(X-9)]=(2X-14)\/[(X-6)(X-8)]所以有:2X-14=0 或(X-5)(X-9)=(X-6)(X-8)前者得:X=7,后者没解.因此原方程只有一个解x=7
解一个方程,(简便的计算)
5、合并同类项 6、未知数的系数化为1 解:1\/(x-5)-1\/(x-6)=1\/(x-8)-1\/(x-9)1\/[(x-5)*(x-6)]=1\/[(x-8)*(x-9)](x-5)*(x-6)=(x-8)*(x-9)x^2-11x+30=x^2-17x+72 17x-11x=72-30 6x=42 x=7 ...
1\/x-5-1\/x-6=1\/x-8-1\/x-9
(x-6-x+5)\/(x-5)(x-6)=(x-9-x+8)\/(x-8)(x-9)-1\/(x-5)(x-6)=-1\/(x-8)(x-9)(x-5)(x-6)=(x-8)(x-9)x²-11x+30=x²-17x+72 解得 x=7
(1\/x-5)+(1\/x-9)=(1\/x-8)+(1\/x-6)怎么做
(1\/x-5)+(1\/x-9)=(1\/x-8)+(1\/x-6) 两边通分得 (2x-14)\/(x^2-14x+45)=(2x-14)\/(x^2-14x+48) 当2x-14=0,即x=7时 明显成立 当2x-14不等于0时, 1\/(x^2-14x+45)=1\/(x^2-14x+48) 该方程无解 所以原方程的解为x=7 ...
(x-4)\/(x-5)+(x-8)\/(x-9)-(x-5)\/(x-6)-(x-7)\/(x-8)分式计算
方法一:就是直接通分。。方法二:个人觉得算是比较简单的方法,省去了化简乘式的繁琐。见下:(x-4)\/(x-5)=1+1\/(x-5)以下同此化简可得式:1+1\/(x-5)+1+1\/(x-9)-[1+1\/(x-6)]-[1+1\/(x-8)]= 1\/(x-5)+1\/(x-9)-1\/(x-6)-1\/(x-8)=1\/[(x-7)+2]+1\/[(x-...
1\/(x-5)+1\/x=1\/6,,,能给详细的解题过程吗?
2017-11-27 (1\/x)+(1\/x+5)=1\/6 这方程求解,步骤详细,x... 2 2017-03-01 解方程,要详细步骤的X\/6-1=X\/9+1 10 2018-04-03 a(1+x%)=a(1-5%)[1+(x-6)%] 求解题过... 2011-03-22 1\/x+1\/(x+5)=1\/6求x 要详细过程,是怎样去掉分... 2012-01-29 1\/4(x-3)+1\/5(x...
解方程:1\/(x-7)-1\/(x-5)=1\/(x-6)-1\/(x-4) 要写清楚
x-5)通分 (2x-11)\/(x-7)(x-4)=(2x-11)\/(x-6)(x-5)(2x-11)[1\/(x^2-11x+28)-1\/(x^2-11x+30)]=0 因为x^2-11x+28不等于x^2-11x+30 所以1\/(x^2-11x+28)-1\/(x^2-11x+30)不等于0 所以所以2x-11=0 x=11\/2 分式方程要检验 经检验,x=11\/2是方程的解 ...
[1\/(x-5)]+(1\/x)=1\/6怎么解
你好,先通分 两边同时乘以x(x--5)得:x+x--5=x(x--5)\/6 即:12x--30=x^2-5x 即:x^2--17x+30=0 (x--2)(x--15)=0 得:x=2 或 x= 15 不懂可以追问,望采纳,谢谢!
解方程1\/(x-2)+1\/(x-8)=1\/(x-4)+1\/(x-6)
不要去分母,左边右边分别通分,分子上两边都是-2可以约去,然后就剩下两边分母(X-2)(X-4)=(X-6)(X-8),这样就可以解得X=5
解方程:1\/(x+5)+1\/(x+8)=1\/(x+6)+1\/(x+7)
解:1\/(x+5)+1\/(x+8)=1\/(x+6)+1\/(x+7)(x+5+x+8)\/[(x+5)(x+8)]=(x+6+x+7)\/[(x+6)(x+7)](2x+13)\/(x²+13x+40)=(2x+13)\/(x²+13x+42)由于分母x²+13x+40恒≠x²+13x+42,要等式成立,只有分子为0,即 2x+13=0 x=-13\/2 ...