Question

Помогите поже!!!!!!!!!!!!!!!!

Answer 1

$a_{n} =4n-3$

$a_{1} =4*1-3=1$

$a_{2} =4*2-3=5$

$a_{3} =4*3-3=9$

$a_{4} =4*4-3=13$

$a_{5} =4*5-3=17$