Question

find the 20th term from the last term of the AP. :3,8,13,.............,253

Answer 1

Solution :

We have, l = Last term = 253

and,

               d = Common difference = 8 - 3 = 5

∴ 20th term from the end = l - (20 - 1)d

                                           = l - 19d

                                           = 253 - 19 × 5

                                           = 253 - 95 = 158

Answer 2

Answer:

refers to the attachment.