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GAOKAO · Conic Sections · Advanced

Conic Sections: Director circle of math: radius?

Ellipse, hyperbola, parabola standard forms.

Try the problem

Director circle of x225+y29=1\dfrac{x^2}{25}+\dfrac{y^2}{9}=1: radius?

Hint and answer

Concept to use

Intersection of conics.

Hint

a2+b2\sqrt{a^2+b^2}.

Answer

\sqrt{34}

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