Question

calcule a soma dos 100 primeiros multiplos de 5

Answer 1

S 100 = ?
A 1 = 0
R = 5
S 100 = 100.(A1 + A 100) /2
5 100 = 100(0 + A100)/2
A 100 = A 1 + (N - 1 ).R
A 100 = 0 + (100 - 1 ).5
A 100 = 0 + 99.5
A 100 = 0 + 495
A 100 =495
S 100 = 100 . (0 + 495)/2
S 100 = 100(495)/2
S 100 = 49500/2
S 100 = 24750