Question

interpole 8meios aritméticos entre 120 e 210

Answer 1

a1 = 120
an = 210
n = 10
r = ?

an = a1 + (n-1).r
210 = 120 + (10-1).r
210 - 120 = 9r
9r = 90
r = 90/9
r = 10

P.A (120, 130, 140, 150, 160, 170, 180, 190, 200, 210)