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

1.	Find the 20th term from the last of the AP 3,8,13........253
Answer» 158 is the right answer \xa03,8,13.......,253\xa0To find 20th term form the last term we consider the sequence as followsa = 253 and d = 3 - 8 = -5an\xa0= a + (n - 1)da20\xa0= a + (20 - 1)d = 253 + 19\xa0×\xa0(-5) = 253 - 95 = 158Hence, the 20th term from the last term is 158. 158 368

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