Răspuns :
Răspuns:
5n(1+2+3+....+100)=75 750
5n•(100•101/2)=75 750 |:5
n•5050=15 150
n=15150:5050
n=3
5n+10n+15n+....+500n=75750
5n(1+2+3+...+100)=75750
5n×(100×101)/2=75750
5n×50×101=75750
505n×50=75750
25250n=75750
n=75750:25250
n=3
Răspuns:
5n(1+2+3+....+100)=75 750
5n•(100•101/2)=75 750 |:5
n•5050=15 150
n=15150:5050
n=3
5n+10n+15n+....+500n=75750
5n(1+2+3+...+100)=75750
5n×(100×101)/2=75750
5n×50×101=75750
505n×50=75750
25250n=75750
n=75750:25250
n=3