若分式2x-5分之x 5-2x分之a-搜答案-智慧作业帮

X²-3X分之5X-7=X-1分之2+X-2分之3X²-3X分之5X-7=(X-1)(X-2)分之[2(X-2)+3(X-1)]X²-3X分之5X-7=(X²-

1.-7ab/c2.(x-4)/23.-a^2*b/2*x^2*b4.2*x/(x^2-1)5.2*a/(a^2-1)6.(x+y)*(x-y)/(x-y)^2=(x+y)/(X-y)=1.27.(3

(x+2)/(x+1)=(x+1+1)/(x+1)=1+1/(x+1)其他一样所以原式=1/(x+1)-1/(x+2)-1/(x-5)+1/(x-4)=(x+2-x-1)/(x+1)(x+2)+(x-

原式=[x²/(x-1)]-x-1=[x²/(x-1)]-[(x+1)(x-1)]/(x-1)=[x²/(x-1)]-(x²-1)/(x-1)=[x²

即2x/(2x-1)-5/(2x-1)=3两边乘2x-12x-5=6x-34x=-2x=-1/2经检验,x=-1/2是方程的解

解(x-1)/(x-5)=m/(10-2x)(x-1)/(x-5)=-m/2(x-5)两边乘以2(x-5)得：2(x-1)=-m∵方程无解∴x=5∴2×(5-1)=-m∴m=-8

已知分式4x^2-1分之6x^2+x-2的值为0,则x^-1=∵分式4x^2-1分之6x^2+x-2的值为0∴6x²+x-2=04x²-1≠0(3x+2)(2x-1)=0∴3x+2

﹙2x－5﹚/﹙x－2﹚＝﹣3/﹙x－2﹚2x－5＝﹣32x＝2x＝1经检验x＝1是原方程的解.

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

无意义则分母x+1=0x=-1所以原式=5/(4m+2)-1/(2m+1)=(5-2)/(4m+1)=3/(4m+1)

x/(2x-5)+5/(2x-5)=2两边乘2x-5x+5=4x-103x=15x=5经检验,x=5是方程的解

x/(x-5)=(x-2)/(x-6)两边同乘惟(x-5)(x-6)x(x-6)=(x-2)(x-5)x^2-6x=x^2-7x+10x=10检验,代回到方程左边=10/(10-5)=2右边(10-2

(2x-5)/(x-2)=(3x-3)/(x-2)-3方程两边均乘以(x-2)通分得2x-5=3x-3-3(x-2)2x-5=3x-3-3x+62x=3+52x=8即x=4

x²-x-1=0x²=x+1x^4=(x+1)²=x²+2x+1=(x+1)+2x+1=3x+2x^5=x^4*x=(3x+2)*x=3x²+2x=3

当x=3,分式无意义,当x=1/2,分式值为0

两边乘以(x+2)(x-2)得x(x-2)-(x-2)²=kx²-2x-x²+4x-4=k2x=k+4∵无解∴x=-2或2当x=-2时k=-8当x=2时k=0

当x+2不=0,即X不=-2时,有意义.再问：我写错了，应该是当x()时,分式2+x分之x无意义再答：是的，当X=-2时，分式2+X分之X无意义。

1.(x+1)/(x-1)-4/(x²-1)=1都乘以(x+1)(x-1)得到(x+1)²-4=x²-1x=1代人检验是增跟,原方程无解.2.(3x+4)/(3x-5)+

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)