Insert AMs between 7 and 71 such that `5^(th)` AM is 27. Also find the number of AMs

Explanation

Let the series be `7, A_1, A_2, A_3, …….., A_n, 71 `


We know total terms in A.P are `n + 2` .


So `71` is the `(n + 2)th` term.


By using the formula, `A_n = a + (n – 1)d `


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