求通分,
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/24 02:38:23
求通分,求通分,求通分,∵a/(a^2-4a+4)=a/(a-2)^2b/(2a^2-8a+8)=b/[2(a-2)^2]c/(3a-6)=c/[3(a-3)∴公分母为:6(a-2)^2∴a/(a^2
求通分,
求通分,
求通分,
∵a/(a^2-4a+4)=a/(a-2)^2
b/(2a^2-8a+8)=b/[2(a-2)^2]
c/(3a-6)=c/[3(a-3)
∴公分母为:6(a-2)^2
∴a/(a^2-4a+4)=6a)/[6(a-2)^2]
b/(2a^2-8a+8)=3b/[6(a-2)^2]
c/(3a-6)=2c(a-2)/[6(a-2)^2]
同理,x/(y^2-4y+4)=x/(y-2)^2
(x+1)/2y-y^2)=-(x+1)/[y(y-2)]
1/y=1/y
∴上述三个式子的公分母为:y(y-2)^2
∴x/(y^2-4y+4)=xy/[y(y-2)^2]
(x+1)/(2y-y^2)=-(x+1)(y-2)/[y(y-2)^2]
1/y=(y-2)^2/[y(y-2)^2]