Second term of sequence with general term n2 - 4/2 is
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1) The sum of 5 numbers in AP is 30 and sum of their squares is 220. Which of the following is the third term ?
2) Common difference of sequence 5,8,11,14,… is
3) 1,8,15,22,29,36,… is
4) A.P whose nth term is 2n-1 is
5) The sum of the first ten terms of an AP is four times the sum of the first five terms, then the ratio of the first term to the common difference is