1.
The circle cuts an intercept on -axis of length
2.
If the eccentricities of the ellipse and the hyperbola are reciprocals of each other, then is equal to
3.
The ellipse is inscribed in a rectangle aligned with the coordinate axes, which is turn in inscribed in another ellipse that passes through the point (4, 0). Then, the equation of the ellipse is
4.
The Cartesian equation of the directrix of the parabola whose parametric equations are is
5.
The line is the directrix of the parabola Then one of the value of is