Question

if a=3 and t6 =27 ,find the sum of the first six term of the A.P​

Answer 1

Step-by-step explanation:

Here's the solution.

Hope this wil help you.

Answer 2

Answer:

solution:

a=3 ,an = 27 and n=6

sn=n/2(a+an)

=6/2( 3+27)

sn= 90