Question

termo geral da p.A(2,7,...)

Answer 1

Formula da PA

An=a1+(n-1).r

Dados:

A1=2
N=?
R=7-2 =5

An=2+(n-1)5
An=2+5n-5
An=-3+5n

O termo geral

An=-3+5n

Answer 2

an = a1 + (n - 1).r
an = 2 + (n - 1).5
an = 2 + 5n - 5
an = 2 - 5 + 5n
an = - 3 + 5n
an = 5n - 3

Resp.: an = 5n - 3