Question

First term and common difference of on A.P.are 6 and 3 respectively; find S_(2r) a=6 d=3 S=?​

Answer 1

Given :-

First term = 6

Common difference = 3

To Find :-

27th term

Solution :-

We know that

aₙ = a + (n - 1)d

• n = 27

a₂₇ = 6 + (27 - 1)3

a₂₇ = 6 + (26)3

a₂₇ = 6 + 78

a₂₇ = 84