Question

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

Answer 1

Answer:

S6 = 6/2(3+27)

=3x30

=90

the sum of first 6 terms of the ap is 90

Answer 2

Answer:

S6=90

Step-by-step explanation:

Sn = n/1 +(n-1)(d)

n=6

a=3

d=24/5

S6 = 90