Question

Find the middle term(s) of the sequence 7,13,19,.....,241

Answer 1

hope this might help you

Answer 2

for the given AP 6 is the common difference right. .....
13-7=6
19-13=6

and last term is 241

a (n) =241
a+(n-1)d = 241
7+(n-1)6 = 241
(n-1)6 =241-7
(n-1) =234/6
n-1 =39
n=40

there are 40 terms. ..
n is even
middle term = n/2 and (n/2)+1
20 and 21
a (20) = 7 + (20-1)6
=121
a (21) = 7 + (21-1)6
=127


Thank you