ab=1,a+1分之a+b+1分之b的值
问题描述：
ab=1,a+1分之a+b+1分之b的值
答
a/(a+1) + b/(b+1) =(a(b+1)+b(a+1))/((a+1)(b+1)) =(ab+a+ab+b)/(ab+a+b+1) =(a+b+2)/(a+b+2) =1
ab=1,a+1分之a+b+1分之b的值
a/(a+1) + b/(b+1) =(a(b+1)+b(a+1))/((a+1)(b+1)) =(ab+a+ab+b)/(ab+a+b+1) =(a+b+2)/(a+b+2) =1