【数学分式计算,要过程】(ab)分之(a+b)-(bc)分之(b+c) a+1-(a-1)分之a(ab)分之(a+b)-(bc)分之(b+c)a+1-(a-1)分之a

问题描述:

【数学分式计算,要过程】(ab)分之(a+b)-(bc)分之(b+c) a+1-(a-1)分之a
(ab)分之(a+b)-(bc)分之(b+c)
a+1-(a-1)分之a

(ab)分之(a+b)-(bc)分之(b+c)
=c(a+b)/abc-a(b+c)/abc
=(ca+cb-ab-ca)/abc
=b(c-a)/abc
=(c-a)/ac
a+1-(a-1)分之a
=(a+1)(a-1)/(a-1)-a/(a-1)
=a^2-1-a)/(a-1)