Question

interpole 4 meios aritméticos entre 2 e 42.

Answer 1

an = a1 + (n-1)r
42 = 2 + 5r
5r = 40
r = 8
PA 2,10,18,26,34,42.

Answer 2

Formula - An = A1 + (n - 1).r
An= 2
n= 6
A10= 47

42 = 2 + ( 6-1 ) . r
42-2 = 5 . r
40 = 5r
40/5
r= 8
{ 2, 10, 18, 26, 34, 42 }