Part b of the question I am pretty sure it is 49/6 but this says its wrong

Question

part b of the question. I am pretty sure it is 49/6 but this says its wrong

1 6n n
n 1 7 . Solución.
The serie can be written by the sum of two series: 1 6n
1 n
n
n 1 7
n 1 7 n 6n n
n 1 7 1 6n
1 n
n 1 7
n 1 7 6 n 1 7 n Booth cases are geometric series with the form: ar ,…
Math