A. 5x2+5y2-8x+14y-32=0

B. 5x2+5y2+8x+14y+32=0

C. 5x2+5y2-8x-14y-16=0

D. 5x2+5y2-8x-14y+16=0

The equation of the chord of contact of the point (4, 2) with respect to the circle x^{2}+y^{2}-5x+4y-3=0 is

The two circles x^{2}+y^{2}=a^{2}, x^{2}+y^{2}=c^{2}(c>0) touch each other if

The area of the quadrilateral formed by the tangents from the point (4,5) to the circle x^{2}+y^{2}-4x-2y-11=0 with a pair of radii joining the points of contact of these tangents is

The equation of the normal to the curve (x/a)^{2/3}+(y/b)^{2/3}=1 at (a cos^{3}θ, b sin^{3}θ ) is

The distance between the limiting points of the coaxial system x^{2} + y^{2} – 4x – 2y – 4 + 2λ(3x + 4y + 10)=0