Question

determine os 10 primeiros termos an=4n-2 ?

Answer 1

a n = 4 n - 2
a 1 = 4 . 1 - 2
a 1 = 4 - 2
a 1 = 2
a 2 = 4 . 2 - 2
a 2 = 8 - 2
a 2 = 6
a 3 = 4 . 3 - 2
a 3 = 12 - 2
a 3 = 10
(2 , 6 , 10 ,14 , 18 , 22, 26,30,34,38 )
r = a 2 - a 1
r = 6-2
r = 4