Find the eccentricities and foci of the following ellipse:`9x^2+25y^2=225`.

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

Find the eccentricities and foci of the following ellipse: 3x^2+4y^2=48 .

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

Find the derivative of the following functions: y = sqrt(x^2 + a^2) .

Find the solution sets of the following inequations. 9ltx^2lt25 .

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

Find the derivative of the following functions: y =sqrt((1+x^2))/x .

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 solution sets of the following inequations. x^2lt9 .