解分式方程3x减4分之x 4减3x分之5等于1-搜答案-百度作业网

a＝1或－2

原式变型的：（3-x)/(x-4)＋1/(x-4)=1方程两边同乘以（x-4）解得：x=4经检验x=4是曾根,所以原方程无解

x-1分之3-x(x-1)分之x+2=03x-(x+2)=02x=2x=1检验：x=1是增根∴方程无解

3x+x+2=44x=2x=1/2检验：x=1/2是方程的根∴方程的根是x=1/2

变形为x（x+3)分之8-4x+x=3分之2x-3=2通分x（x+3）分之8-4x+x(2x-3)=2x(x+3)分之8+2x方-7x=22x方+6x=8+2x方-7x13x=8x=8/13

3/x-4/(x-1)=-6/x(x-1)两边乘x(x-1)3(x-4)-4x=-63x-12-4x=-6x=-6经检验,x=-6是方程的解

2/(3x)+3/(2x)+1/x=14/(6x)+9/(6x)+6/(6x)=119/（6x)=1.6x=19x=19÷6x≈3.16666666666

(3x+2)分之(9x+7)-(2x+3)分之(4x+5)=1[(3x+2)(2x+3)]分之[(9x+7)(2x+3)-(4x+5)(2x+3)]=1(6x²+13x+6)分之[(18x&

3/2(x-2)-x/(x-2)=1/23-2x=x-2-3x=-5x=5/3检验：x=5/3是方程的解∴方程的解是x=5/3再问：你那个是2分之3(x-2)-x分之x-2吗？再答：不是的是2(x-2

x+1/x==3两边乘xx²+1=3x两边平方x^4+2x²+1=9x²x^4+x²+1=8x²所以x²/(x^4+x²+1)=1

即1/(x+3)+1/(x-3)=1/(x+3)(x-3)两边乘(x+3)(x-3)x-3+x+3=1x=1/2经检验,x=1/2是方程的解再问：对不起题目打错了。。呵呵是x加3分之1减去3减x分之2

原分式方程可变形为；5x+2/x(x+1)=3/x+1分式两边同乘公分母得：5x+2=3x解得：x=1检验：当x=1时,公分母x(x+1)不等于0所以x=1是原分式方程的解(/表示除号）再问：你算错啦

答：5/(x-2)=3/x3(x-2)=5x3x-6=5x5x-3x=-62x=-6x=-3经检验,x=-3是原分式方程的根

*3+1/3*4+...+1/n(n+1)=1-1/2+1/2-1/3+1/3-1/4+……+1/n-1/(n+1)=1-1/(n+1)=n/(n+1)1/1*3+1/3*5+1/5*7+.1/(2n

x+1/x=3两边平方x^2+2*x*1/x+1/x^2=3^2x^2+2+1/x^2=9x^2+1/x^2=7x^2/(x^4+x^2+1)上下除以x^2=1/(x^2+1+1/x^2)=1/(7+

1/（x-1）=4/(x^2-1)1/（x-1）-4/[(x-1)(x+1)]=0(x+1-4)/[(x-1)(x+1)]=0(x-3)/[(x-1)(x+1)]=0x=3

3/4x-11/20x4=2两边乘2015x-44=4015x=44+4015x=84x=5.6

X=4原式=(X-1)/(X-2)-(X-2)/(X-3)=(X-4)/(X-5)-(X-5)/(X-6)左边通分=[X^2-4X+3-X^2+4X-4]/[(X-2)(X-3)]=-1/[(X-2)

3x/(3x-1)+x/(x-1)=2都乘以(x-1)(3x-1)得：3x(x-1)+x(3x-1)=2(x-1)(3x-1)3x²-3x+3x²-x=6x²-8x+2解