Question

1. First term and common difference of an A.P. are 6 and 3 respectively; find S27
a = 6, d = 3, S2 = ?
S.
27
S = 2 (0+ (n-1) d]
27
[12 + (27-1) O)
2
27
X
2
= 27 x 45 =


please dont give wrong ans ​

Answer 1

Answer:

Perimeter of Dodecagon is answer.