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There are n A.M.s between 3 and 17. The ...

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`

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Let` A1,A2,A3,A4,……An` be the n arithmetic means between 3 and 17
Let d be the common difference of the A.P. `3,A1,A2,A3,A4,……An` and `17`
Then, we have:
`d=17−3/(n+1)=14/(n+1)`
...
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