(1)填空:分式方程1的解为---,分式方程2的解为---;
(2)解分式方程3;
(3)根据上述方程的规律及解的特点,直接写出方程n及它的解。
解方程:1. x\/x+1-1=3\/(x+1)(x-2) 2. 3\/x+2+1\/x=4\/x²+2x 3. 2\/3...
当x = -1 时,x+1 = 0,所以 x = -1舍去,原方程无解。2解:3\/(x+2)+1\/x=4\/(x²+2x)3\/(x+2)+1\/x=4\/x(x+2) 分解因式 3x+x+2=4 去分母 4x=2 移项、合并同类项 x=1\/2 系数化为1 3解方程 (2\/3) + x\/(3x-1) =1\/(9x-3), 求x 解:用3...
用等式性质解方程, 1-2(x-1)=3+2 2\/1x+1=3\/1x-2
两边同时减去1 -2(x-1)=4 两边同时除以-2 x-1=-2 两边同时加上1 x=-1 2\/1x+1=3\/1x-2 两边同时乘以6 3x+6=2x-12 两边同时减去2x 3x-2x+6=2x-12-2x x+6=-12 两边同时减去6 x=-18
解分式方程:(1)3\/(x-1)=2\/(x-2);(2)(2x²+1)\/(x+2)=2x;(3)x\/(x+...
解:(1)3\/(x-1)=2\/(x-2)3(x-2)=2(x-1)x=4 (2)(2x²+1)\/(x+2)=2x 2x²+1=2x(x+2)x=1\/4 (3)x\/(x+1)+(x-1)\/x=2 (x²+x²-1)\/x(x+1)=2 2x²-1=2x(x+1)x=-1\/2 (4)2\/(x+1)+3\/(x-1)=6\/(x²-1)(2x-2+...
解方程:(1)1\/(x+1)=2\/(x-1) (2)1\/(x+2)+3=x-1\/x-2
即2x+2=x-1 解得x=-3 检验x=-3是方程的根 ②由1\/(x+2)+3=x-1\/(x-2)两边乘以(x+2)(x-2)即(x-2)+3(x+2)(x-2)=(x-1)(x+2)即x-2+3(x^2-4)=x^2+x-2 即x-2+3x^2-12=x^2+x-2 即2x^2=12 即x^2=6 即解得x=±√6 检验x=±√6是方程...
...1 (2).(1\/x-2)+3=x-1\/x-2 (3).2-x\/3+x=1\/2+1\/x+3
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 (2).(1\/x-2)+3=x-1\/x-2 (3).2-x\/3+x=1\/2+1\/x+3
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...
解方程:3\/x-1=2\/x-2 2x²+1\/x+2=2x x\/x+1+X-1\/=2
3\/(x-1)=2\/(x-2)交叉相乘,得 2(x-1)=3(x-2)2x-2=3x-6 -x=-4 x=4 (2x^2+1)\/(x+2)=2x 2x^2+1=2x(x+2)2x^2+1=2x^2+4x 4x=1 x=1\/4 最后一道题目有问题
解下列分式方程 (1) 1\/2x=2\/x+3 (2) 2\/x-1=4\/x^{2-1} .
解:(1)方程的两边同乘2x(x+3),得 x+3=4x,解得x=1,检验:把x=1代入2x(x+3)=8≠0.∴原方程的解为:x=1;(2)方程的两边同乘(x-1)(x+1),得 2(x+1)=4,解得x=1,检验:把x=1代入(x+1)(x-1)=0.∴x=1是原方程的增根.
8.解方程:-|||-(1) 1\/(x+1)=2\/(x-1)?
解方程::1\/(x+1)=2\/(x-1)解:去分母得:x-1=2(x+1)x-1=2x+2 x-2x=2+1 -x=3 x=-3 经检验:x=-3是原分式方程的解。
(x\/x-1)-1=3\/(x-1)(x+2)解分式方程
(x\/x-1)-1=3\/(x-1)(x+2)[x-(x-1)]\/(x-1)=3\/(x-1)(x+2)1\/(x-1)=3\/(x-1)(x+2)去分母得:x+2=3 x=1 检验知:x=1是增根;所以原方程无解