If the first term of an AP is 2 and common difference is 4, then sum of its firs

If the first term of an AP is 2 and common difference is 4, then sum of its first 40 terms is

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1) If the first term of an AP is 2 and common difference is 4, then sum of its first 40 terms is

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

3) An AP consist of 31 terms if its 16th term is m, then sum of all the terms of this AP is

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

5) 25 trees are planted in a straight line 5 metres apart from each other. To water them the gardener must bring water for each tree separately from a well 10 metres from the first tree in line with the trees. How far will he move in order to water all the trees beginning with the first if he starts from the well ?