Question

interpolar 10 meios aritméticos entre 2 e 57 e escrever a P.A correspondente com primeiro termo igual a 2.

Answer 1

$a_n=a_1+(n-1)*r\\\\ 57=2+(12-1)*r\\\\ 57-2=11r\\\\ 11r=55\\\\ r=\frac{55}{11}\\\\ \boxed{r=5}$


PA(2,7,12,17,22,27.32,37,42,47,52,57)