Question

Find the eleventh term from the last term of the AP: 27, 23, 19, ..., –65.

Answer 1

We can reverse this finite A.P given =>-65,-61,-57,......,27 as the common difference is 4 when we reverse the A.p now A11 = A + 10d = -65+10*4 = -65 + 40 = -25.

Answer 2

First of all, Reverse the AP

Now
a = -65
d = 4

11th term will be
an = a+(n-1)d
a11 = -65+10(4)
a11 = -65+40
a11 = -25