TS EAMCET 2015 Solved Paper
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Question : 30 of 160
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The line x + y = k meets the pairs of straight lines x 2 + y 2 − 2 x − 4 y + 2 = 0 in two points A and B.If O is the origin and ∠A O B = 90 ° then the value of k > 1 is
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