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[" If the tangent at the point "P(h,k)" on the hyperbola "(x^(2))/(a^(2))-(y^(2))/(b^(2))=1" circle "x^(2)+y^(2)=a^(2)" at the "],[" points "Q(x_(1),y_(1))" and "R(x_(2),y_(2))," then "(1)/(y_(1))+(1)/(y_(2))" is equal to "],[[" (A) "(2)/(k)," (B) "(1)/(k)," (C) "(a)/(k)," (D) "(b)/(k)]]

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