Insert 7 A.M.s between 2 and 17.

Explanation

Let `A_1, A_2, A_3, A_4, A_5, A_6, A_7 `be the 7 AMs between `2 and 17 `.


Then, `2, A_1, A_2, A_3, A_4, A_5, A_6, A_7, 17 `are in AP .


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


`a_n = 17, a = 2, n = 9`


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