Question

aflati trei numere naturale stiind ca doua cate doua au media aritmetica:5.8 si 12.Va rog mult ajutatima

Answer 1

Stiim ca:  (a+b):2=5      =>   a+b=10

                (a+c):2=8      =>   a+c=16

                (b+c):2=11    =>   b+c =22

                    suma lor este  2(a+b+c)=48 => a+b+c=24

                                                                            ↓

                       media aritmetica va fi ...     (a+b+c) : 3 = 8 .

Numerele sunt: a = 24-22 = 2 ;  b = 24-16 = 8  si   c = 24-10 = 4.