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The value of |c| for which the set {(x,y):x2+y2+2x≤1}∪{(x,y):x−y+c≥0} contains only one point is equal to ___

Answer» The value of |c| for which the set {(x,y):x2+y2+2x1}{(x,y):xy+c0} contains only one point is equal to ___


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