Find the sum of the following arithmetic progression: `3,9/2,6,15/2,………..`to 25 terms.

Explanation

Given that, `3, 9/2, 6, 15/2, … to 25 terms `


Here, `n = 25`


Here the first term,` a = a_1 = 3`


Common difference, `d = a_2 – a_1 = 9/2 – 3 = (9 – 6)/2 = 3/2`


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