Question

The first term of an A.P.is 6 and the common difference 3.find S27

Answer 1

Answer:

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Answer 2

Answer: S27=1251

Step-by-step explanation:ince ,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