Question

dada a P.A. (3, 10, 17,24, ... ) a) a razao da P.A b) o 18 termo

Answer 1

Razão

$a2 - a1$

$10 - 3 = 7$

18⁰ TERMO

$a18 = a4 + 14r$

$a18 = 24 + 14.7$

$a18 = 24 + 98$

$a18 = 122$