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[" If the tangent at the point "P(h,k)" on the hyperbola "(x)/(a^(2))-(y)/(b^(2))=1" cuts the 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)/(2)," (B) "(1)/(2)," (C) "(a)/(2)," (D) "(b)/(2)]]

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