[" Q."16" The circum-circle of the quadrilateral "],[" formed by the lines "x=a,x=2a,y=-a,y],[quad =a" is- "],[[" (a) "x^(2)+y^(2)+3ax-a^(2)=0],[" (b) "x^(2)+y^(2)-3ax+a^(2)=0],[" (d) "x^(2)+y^(2)+3ax-a^(2)=0]]

Circum centre of the triangle formed by the lines x+y=0,2x+y+5=0,x-y=2 is

The quadrilateral formed by the lines 2x-5y+7=0,5x+2y-1=0,2x-5y+2=0,5x+2y+3=0 is

Area of quadrilateral formed by straight lines 2x =- 5 , 2y = 3 , x=1 and y + 2 = 0 is

Area of quadrilateral formed by two pair of lines a^(2)x^(2)-b^(2)y^(2)-c(ax+by)=0 and a^(2)x^(2)-b^(2)y^(2)+c(ax-by)=0 is

Area of quadrilateral formed by two pair of lines x^(2)-y^(2)-3(x+y)=0 and x^(2)-y^(2)+3(x-y)=0 is

Find (d^(2)y)/(dx^(2)) ,if y^(3)+3ax^(2)+x^(3)=0

The equation of the incircle of the triangle formed by the coordinate axes and the line 4x + 3y - 6 = 0 is (A) x^(2) + y^(2) - 6x - 6y - 9 = 0 (B) 4 (x^(2) + y^(2) - x - y) + 1 = 0 (C) 4 (x^(2) + y^(2) + x + y) + 1 = 0 (D) 4 (x^(2) + y^(2) - x - y ) - 1 = 0

If x ^(3) + y^(3) = 3ax ^(2) then y _(2)=

If x^(3)+y^(3)=3ax^(2) , show that, (d^(2)y)/(dx^(2))+(2a^(2)x^(2))/(y^(5))=0 .

If x ^(3) - 3ax ^(2) + y ^(3) =0 then y ^(5) y _(2) =