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If P(x1,y1), Q(x2,y2), R(x3,y3) be the points of inflection of the curve x2y−x+y−1=0, then number of rational vertices of the polygon PQR is

Answer» If P(x1,y1), Q(x2,y2), R(x3,y3) be the points of inflection of the curve x2yx+y1=0, then number of rational vertices of the polygon PQR is


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