Question

insira 11 meios aritméticos entre 1 e 37

Answer 1

a1 = 1
an = 37
n = 13
r = ?

an = a1 + (n-1).r
37 = 1 + (13-1).r
37 - 1 = 12r
12r = 36
r = 36/12
r = 3

P.A (1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37)