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

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



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4) Common difference of sequence 5,8,11,14,… 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 ?

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