There are `n` A.M.s between 3 and 17. The ratio of the last mean to the first mean is 3:1. Find the value of `ndot`

Explanation

Let the series be `3, A_1, A_2, A_3, …….., A_n, 17 `


Given, `a_n/a_1 = 3/1`


We know total terms in AP are` n + 2`


So, `17` is the `(n + 2)th `term


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