Question

Interpole 11 meios aritméticos entre -16 e 20

Answer 1

$a_{n} = a_{1} + (n - 1 ).r \\ 20 = -16 + (12 ).r \\ 20 + 16 = 12r \\ \\ r = \frac{36}{12} = 3$

P.A = {-16, - 13, -10, -7, -4, -1, 2, 5, 8, 11, 14, 17, 20}