[NCERT]quad 13.x^(x)+y^(y)=1

The equation (13x -1)^(2) + (13y -1)^(2) =k (5x-12y+1)^(2) will represent a parabola, if

The equation (13x -1)^(2) + (13y -1)^(2) =k (5x-12y+1)^(2) will represent a parabola, if

From a point on x+2y-7=0 tangents are drawn to curve 13(x^(2)+y^(2)-2x+1)=(2x+3y-1)^(2) are perpendicular then the point is (a)(19,13) (b) (-19,13) (c) (19,-13) (d)(-19,-13)

Find the value of x and y (1)/(2x)+(1)/(3y)=2 (1)/(3x)+(1)/(2y)=(13)/(6)

The value of a for which (13x-1)^(2)+(13y-2)^(2)=(a^(2)-1)(5x+12y-1)^(2) repesents an ellipse is

The set of values of a for which (13x-1)^(2)+(13y-2)^(2)=a(5x+12y-1)^(2) represents an ellipse is

The set of values of 'a' for which (13 x-1 ) ^(2) + (13y -2) ^(2) =a( 5x+ 12y -1)^(2) represents an ellipse if