Let 2^{{nd}{~}},8^{{th}{~}} and 44^{{th}{~}} terms of a non-constant A. P. be respectively the 1^{{st}{~}},2^{{nd}{~}} and 3^{{rd}{~}} terms of a G. P. If the first term of the A. P. is 1, then the sum of its first 20 terms is equal to: Sequence & Series (Mathematics) Question | DivineJEE | divineJEE