Find the 17th term from the end of the AP: 1, 6, 11, 16….. 211, 216
First term of given AP, a = 1
Last term, l = 216
Common difference of AP, a2 - a1 = 6 - 1 = 5
We know that, nth term from last of an AP is
an = l - (n - 1)d
where l is last term and d is common difference.
17th term from last,
a17 = 216 - (17 - 1)5
= 216 - 80
= 136