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media aritmetica a 3 nr nat este 655 stiind ca primu este 713 calculati media arit. celor 3 nr

Răspuns :

(a +b+c):3=655 a=713 (713+b+c):3=655 713 +b+c= 1965 b+c=1965–713 b+c=1252 (b+c):2=1252:2=626 Verificare: (713+1252):3=1965:3=655
(713 +b+c):3=655
713 + b+c=655*3
713+b+c=1965
b+c=1965-713
b+c=1252
Media aritmetica a celor doua nr e :
b+c=1252
(b+c):2=626