Question

quantos termos devemos somar em (-15,-12 ,-9, ....) para soma igual a 270

Answer 1

r = a2 -a1

r = -12 + -15

r = 3

-15, -12, -9, -6, -3, 0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42

Soma = 270

Precisaria de 20 Termos