...x分之(x-2)-(x-2)分之3x=2 (2)5x分之(x平方+1)+( x平方+1)分之5x=...
(1)(x-2)\/x-3x\/(x-2)=2;设t=x\/(x-2);则原方程可化为:1\/t-3t=2; 即:3t^2+2t-1=0; 解得 t=1\/3;或t=-1 t=1\/3, x\/(x-2)=1\/3, 3x=x-2, x=-1;t=-1; x\/(x-2)=-1, -x=x-2, x=1 经检验知:x=1,x=-1都是原方程的解。(2)...
用换元法求 ( X\/(X-1) )^2-5(X\/ (X-1) )^2+6=0 3X\/(X^2-1)+(X^2-1...
(2)t=3x\/(x^2-1) 则原方程可化为 t+1\/t=5\/2 即t^2 -(5\/2)t +1=0 解得t=1\/2 或 t=2 当t=1\/2时,x= 3加减根号10 当t=2时,x=2 或 - 1\/2
用换元法解方程:3x\/X^2-1+X^2-1\/3x=5\/2 帮忙解一下啊!我的过程写的不...
t = 1\/2 或 t = 2 当 t = 1\/2 时,3x\/(x² - 1) = 1\/2 x = 3 + √10 或 x = 3 - √10 当 t = 2 时,3x\/(x² - 1) = 2 x = 2 或 x = -1\/2 综上: x = 3 + √10 或 x = 3 - √10 或 x = 2 或 x = -1\/2 ...
...5x+x(x-5)分之24(x+1)+14=0(2)x+1分之2(x平方+1)+x平方+1分之6(x...
解方程:(1) (x²-5x)\/(x+1)+24(x+1)\/x(x-5)+14=0;(2). 2(x²+1)\/(x+1)+6(x+1)\/(x²+1)=7;(3)(x⁴+2x+1)\/x²+(x²+1)\/x=2 .解:(1) (x²-5x)\/(x+1)+24(x+1)\/x(x-5)+14=0 用x(x+1)(x-5)乘方...
数学问题,用换元法解方程(x\/x-1)^2-3(x\/x-1)+2=0
解:令y=x\/x-1,则原方程化为 y^2-3y+2=0 (y-1)(y-2)=0 得y1=1 y2=2 则有 x\/x-1=1 此方程无解 x\/x-1=2 解方程得x=2
用换元法解方程(x-1)\/(x+2)-3\/(x-1)-1=0
x-1)]\/(x-1)-1=0 (x-1)\/(x+2)-(x+2)\/(x-1)+1-1=0 (x-1)\/(x+2)-(x+2)\/(x-1)=0 设(x-1)\/(x+2)=y,则y-1\/y=0 即:y²-1=0,解得:y1=1 y2=-1 即:(x-1)\/(x+2)=1,或者(x-1)\/(x+2)=-1 解得:x=-1\/2 经检验是原方程的根 ...
用换元法解方程 根号(x+2\/x-1)+根号(x-1\/x+2)=5\/2
设t=根号(x+2\/x-1),则 t+1\/t=5\/2 t=2 or 1\/2 1.t=2 x+2\/x-1=4 x=2 2.t=1\/2 x+2\/x-1=1\/4 x=-3 所以x=2 or -3
用换元法解方程:(3x平方\/x+1)-(x+1\/x平方)=2?
解之得:y1=-1\/3,y2=1.当y=-1\/3时,x^2\/(x+1)=-1\/3,即3x^2+x+1=0,又因为3x^2+x+1\/12>=0,所以3x^2+x+1=0无解。当y=1时,x^2\/(x+1)=1,即x^2-x-1=0,用公式法就可以得出两个解。代入原式检验知,符合题意。,0,用换元法解方程:(3x平方\/x+1)-(x+1\/x...
(x+1)\/x^2-2x^2\/(x+1)=1用换元法解方程
=1\/y 原方程可化为y-2\/y=1 即y^2-y-2=0 (y-2)(y+1)=0 y=2或y= -1 当y=2即(x+1)\/x^2=2 则2x^2-x-1=0 (2x+1)(x-1)=0 x1= -1\/2 x2=1 当y= -1即(x+1)\/x^2= -1 则x^2+x+1=0 判别式小于0,无解。所以原方程的解是 x1= -1\/2 x2=1 ...
用换元法解方程 1、x²-x-12\/x²-x=4 2、(3x²\/x+1)-(x+1\/x...
此时方程无解.2、设:t=x²\/(x+1) 则原方程可化为:3t-1\/t=2 3t²-2t-1=0 (3t+1)(t-1)=0 t=-1\/3 或 t=1 当t=1时有:x²\/(x+1)=1 x²-x-1=0 x=(1±√5)\/2 当t=-1\/3时有:x²\/(x+1)=-1\/3 3x²+x+1=0 此时方程无...