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

## Answers ( )

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: