Question

does anyone know how to do this? its math progression (please help).)

Answer 1

Answer:

its an AP series and to justify its an AP series, show that common difference is same.

To get the series put n = 1,2,3,4,....we get

$17 \frac{1}{3} \\ 16 \frac{2}{3} \\ 16 \\15 \frac{1}{3}$