" 13."x^(x)+y^(y)=1

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)

If (11- 13x)/(x) + (11- 13 y)/(y) + (11- 13 z)/(z) =5, then what is the value of 1/x + 1/y + 1/z ?

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

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

Solve for x,y. x^2 + y(x+1) = 17 and y^2 + x(y+1) = 13