Find the eccentricity of the hyperbola (ii) x`^2`/16 - y`^2`/9 = 1

Find the eccentricity of the hyperbola (i) x ^2 /4 - y ^2 = 1

What is the eccentricty of the hyperbola 9x^2-16y^2=144 .

Find the coordinates of vertices,the foci,the eccentricity and the equations of the directrix of the following hyperbola. x^2/16-y^2/9=1 .

Find the equations of the tangents to the hyperbola x ^2 - 2y ^2 = 18 which are perpendicular to the line x - y = 0.

What is the eccentricity of the following ellipse? 2x^2+5y^2=20 .

Find the coordinates of vertices,the foci,the eccentricity and the equations of the directrix of the following hyperbola. 16x^2-9y^2=576 .

Find the equation of the tangent to the curve (ii) x^2 +5y^2 = 9at (2,-1)

Find the eccentricities and foci of the following ellipse: x^2+2y^2=2 .

Find the coordinates of the centre, vertices, foci and the equation to the directrices of (ii) 9x ^2 + 25y ^2 = 225

Find the equation of the directrices of the ellipse x^2/25+y^2/9=1 .