👤

Calculeaza suma s=3+8+13+.....+1003

Răspuns :

s=3+8+13+.....+1003
aflam cati termeni are suma:
(1003 - 3) : 5 + 1 = 201
s = (3+1003) × 201 : 2
s = 1006 × 201 : 2
s = 202 206 : 2
s = 101 103