Question

find the 9th term from the end(towards the first term) of the AP, 5,9,13......165​

Answer 1

Step-by-step explanation:

5,9,13,.....,165 are in A P.

let 165 be last term

first term(a)=5,common difference(d)=(9-5)=4 and l =165

nth term from end=l-(n-1)*d

9th term from end =165-(9-1)*4

=165-(4*9-4)

=165-36-4

=125

Hence, 9th term from end =125