If the normal at (ct, ^c/t) on the curve xy = c² meets the curve again in 't' , then

The eccentricity of the hyperbola x² - 4y² = 1 is

For a hyperbola, the foci are at (±4, 0) and vertices at (±2, 0).Its equation is

If e,e' be the eccentricities of two conics S and S' and if e² + e'² = 3, then both S and S' can be

The line y = 4x + c touches the hyperbola x² - y² = 1 iff

If the chords of contact of tangents from two points (x₁,y₁) and (x_2,y₂) to the hyperbola are at right angles, then is equal to

Two diameters with slopes m₁,m₂ are conjugate if

The eccentricity of the conic 9x² - 16y = 144 is

The length of the latus rectum of the hyperbola is

The equation represents