Question

Media aritmetica a trei nr rationale pozitive este 17/36.Suma a doua dintre ele este 7/27.Calculati celalalt numar

Answer 1

a+b+c=(17/36) * 3=17/12
a+b=7/27
c= (a+b+c)-(a+b)=17/12-7/27
12=3*4
27=3³
[12;27]=4*27=108
17/12-7/27=17*9/108-7*4/108= (153-28)/108=125/108=c


verificare

c+a+b=125/108+7/27=125/108+28/108=153/108=17/12  ma =17/36,A, problem,a e bine rezolvata