The equation of family of curves for which the length of the normal is equal to the radius vector is
A. \(y^{2} \mp x^{2}=k^{2}\)
B. \(y \pm x=k\)
C. y2 = kx
D. none of these
Answer:A
The equation of family of curves for which the length of the normal is equal to the radius vector is
A. \(y^{2} \mp x^{2}=k^{2}\) B. \(y \pm x=k\) C. y2 = kx D. none of these