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A number 15 is divided into three parts which are in AP and sum of their squares

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A number 15 is divided into three parts which are in AP and sum of their squares is 83. The smallest part is



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1) 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

2) The sum of 5 numbers in AP is 30 and sum of their squares is 220. Which of the following is the third term ?

3) If the roots of the equation (b - c)x2 + (c - a)x + (a-b) = 0 are equal, then

4) A.P whose nth term is 2n-1 is

5) 1,8,15,22,29,36,… is

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