Question

Encontre o termo geral da PA (2,7...)

Answer 1

an = a1 + (n-1)r
r = 7-2=5
an = 2 + (n-1)5
an = 2 + 5n - 5
an = 5n - 3

Answer 2

a1= 2

r= 7 - 2= 5

an= a1 + (n - 1) • r

an= 2 + (n - 1) • 5

an= 2 + 5n - 5

an= - 3 + 5n