The equation `x^(2)/(r-2)+y^(2)/(5-r)= 1` represents an ellipse if

The equation (x^(2))/(10-a)+(y^(2))/(4-a)=1 represents an ellipse if

Show that the equation (x^(2))/(9-c)+(y^(2))/(5-c)=1 represents. An ellipse if 'c' is a real constant less than 5.

The equation (x^(2))/(10-k)+(y^(2))/(k-4)=1 represents an ellipse if

The equation (x^(2))/(10-a)+(y^(2))/(4-a)=1 represents an ellipse , if

The equation (x^(2))/(10-a)+(y^(2))/(4-a)=1 represents an ellipse , if

The equation (x^(2))/(10-a)+(y^(2))/(4-a)=1 represents an ellipse , if

If the equation (x^(2))/(9-k)+(y^(2))/(5-k)=1 represents an ellipse then

If the equation (x^(2))/(9-c)+(y^(2))/(5-c)=1 represents an ellipse, then the foci are

The equation (x^(2))/(1-r)+(y^(2))/(r-3)+1=0 represents an ellipse if :

If the equation (x^(2))/(16 -K) + (y^(2))/(5-K) = 1 represents an ellipse , then