Question

Calcular o termo geral da P.A (5,2,-1...)

Answer 1

an= a1 + (n - 1) . r

an= 5 + (n -1) .(2-5)

an= 5 + (n-1).(-3)

an= 5 - 3n + 3

an= 8 -3n (termo geral)