the first term of an A.P is 6 and common difference is 3 .find s25​

Question

the first term of an A.P is 6 and common difference is 3 .find s25​

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Ximena 1 week 2021-09-10T15:48:58+00:00 1 Answer 0 views 0

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    2021-09-10T15:50:52+00:00

    Answer:

    since ,a=6 , d=3

    we need to find S27=?

    HERE, Sn=n/2{2a+{n-1}d}

                   =27/2{2×6+{27-1}3}

                   =27/2{12+26×3}

                   =27/2{90}

                   =27×45

                    =1215

    hence sum to 27 terms is 1215

    Step-by-step explanation:

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