If e and e' are the eccentricities of the ellipse `5x^(2)+9y^(2)=45` and the hyperbola `5x^(2)-4y^(2)=45` then `ee' =`
A.9
B.5
C.4
D.1

If e and e' are the eccentricities of the ellipse 5x^(2) + 9 y^(2) = 45 and the hyperbola 5x^(2) - 4y^(2) = 45 respectively , then ee' is equal to

Write the eccentricity of the ellipse 9x^(2)+5y^(2)-18x-2y-16=0

If e_(1) and e_(2) are the eccentricities of the ellipse (x^(2))/(18)+(y^(2))/(4)=1 and the hyperbola (x^(2))/(9)-(y^(2))/(4)=1 respectively and (e_(1), e_(2)) is a point on the ellipse 15x^(2)+3y^(2)=k , then the value of k is equal to

A point at which the ellipse 4x^(2)+9y^(2)=72 and the hyperbola x^(2)-y^(2)=5 cut orthogonally is

the distance between the foci of the ellipse 5x^(2)+9y^(2)=45, is