The curve `x^2-y^2=5` and`x^2/18 +y^2/8=1` cut each other at any common point at an angle-

If the curve ax^(2) + 3y^(2) = 1 and 2x^2 + 6y^2 = 1 cut each other orthogonally then the value of 2a :

If the curves x^2/a^2+y^2/b^2=1 and x^2/25+y^2/16=1 cut each other orthagonally, then a^2-b^2 =

The curves 2x^(2) + 3y^(2) = 1 and cx^(2) + 4y^(2) = 1 cut each other orthogonally then the value of c is:

Prove that the curves x y=4 and x^2+y^2=8 touch each other.

Prove that the curves x y=4 and x^2+y^2=8 touch each other.

If the curves x^2/a^2+y^2/b^2=1 and x^2/l^2-y^2/m^2=1 cut each other orthagonally, then

If the curves y^(2) = 16x and 9x^(2)+by^(2) =16 cut each other at right angles, then the value of b is