👤
a fost răspuns

Aflati numarul natural x daca:3+6+9+.................+297=150x.Va rog!!!!!!!!!(dau coronita!!!)

Răspuns :

formula ar fi
3+3x2+3x3+......+3x99=3x99x100/2=297x50=14850
150x=14850
x=14850/150
x=99
3(1+2+...+99)=150x
3x99x100/2=150x
3x99x50=150x
3x99=3x
x=99

Alte intrebari