Question

Media aritmetica a trei numere naturale este 150,08(3). Aflati cele trei numere, stiind ca al doilea este cu 0,75 mai mare decat primul si media aritmetica a ultimelor doua numere este 150,75.

Answer 1

a+b+c=450.24(9)
b=0.75+a
b+c=301.5
a=450.24(9)-301.5
a=148.74(9)
b=148.74(9)+0.75
b=149.49(9)
c=301.5-149.49(9)
c=152.001(9)

Answer 2

(a+b+c):3=150,08(3)
a+b+c=150,08(3)x3
a+b+c=450,24(9)
b=a+0,75
(b+c):2=150,75
b+c=150,75x2
b+c=301,5⇒ c=301,5-b
a+301,5=450,24(9)
a=450,24(9)-301,5
a=148,74(9)
b=148,74(9)+0,75
b=149,49(9)
c=301,5-149,49(9)
c=152,0001
V: (148,74(9)+149,49(9)+152,0001):3=450,24(9):3=150,08(3)