Question

sabendo que numa pa (1,3,5,7....)calcular a3 a8

Answer 1

P.A.(1,3,5,7, 9, 11 ,13 ,15 ,17, 19 ....)
A 1 = 1
A 2 = 3
R = A 2 - A 1
R = 3 - 1
R = 2
A 3 . A 8
A 3 = 5
A 8 = 15
A 3 * A 8 = 5*15 = 75