Find the 20th term from the last term of the A.p : 3,8,13,...........,253

Find the 20th term from the last term of the A.p : 3,8,13,...........,

1.	Find the 20th term from the last term of the A.p : 3,8,13,...........,253
Answer» an=253+(20-1)×(-5) 253+19×(-5) 253-95=158 158