Question

1)sa se calculeze suma :x=8+16+24+32+.....400.
2)calculati cati lei se obtin din 900E stiind ca 1E-->4,5lei.
3)calculati: 49+2×49+3×49+......11x49
dau coroana

Answer 1

1.
x=8•(1+2+3+....+50)=8•50•51/2=10200
2.
900ۥ4,5=4050 lei
3.
=49•(1+2+3+....+11)=49•11•12/2=3234