Question

Interpolando- se 6 meios aritméticos entre 100 e 184, a razão encontrada valera quanto?

Answer 1

$\boxed{a_n = a_1+(n-1)*r}$

$184 = 100+(8-1)*r\\\\ 184 = 100+7r\\\\\ 7r = 84\\\\ r = \frac{84}{7}\\\\ \boxed{r=12}$

Answer 2

    100 + 7r = 184 

        7r = 184 - 100
        7r = 84
         
          r = 12

     { 100, 112, 124, 136, 148, 160,172, 184 }