Question

5). If the 7th term of an A.P. is 15 and 13th term is 27, find the nth term.
6) Find the sum of the first 69 terms of an A.P. Whose 35 th term is 30.​

Answer 1

Step-by-step explanation:

a+6d=15

a+12d=27

....................

0-6d. =-7

d=7/6

a=15-6(7/6)

=8

n th term=a +(n-1)d

=8+(n+1)7/6