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Two tangents PQ and PR are drawn from an exterior point P(a,b) to the ellipse x2+2y2=2 such that the equation of QR is x+3y=1. Then the value of a+b is

Answer» Two tangents PQ and PR are drawn from an exterior point P(a,b) to the ellipse x2+2y2=2 such that the equation of QR is x+3y=1. Then the value of a+b is


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