Question

Insira quatro meios aritméticos entre 1/2 e 13

Answer 1

pa ( 1 / 2 , ----, -----, ----, ------ , 13 )

An = a1 + ( n - 1 ) • r
13 = 1 / 2 + ( 6 - 1 ) • r
13 = 1 / 2 + 5r
26 = 1 + 10r
26 - 1 = 10r
25 = 10r
r = 25 /10
r = 2,5
pa ( 1 / 2 , 3 , 5,5 ,8, 10,5 , 13 )