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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) If the roots of the equation (b - c)x2 + (c - a)x + (a-b) = 0 are equal, then
3) A.P whose nth term is 2n-1 is
4) 2,4,6,8,10,12,… is
5) If the first term of an AP is 2 and common difference is 4, then sum of its first 40 terms is