Question

20) A circle whose centre
centre is (4,-1)
passes through the focus of the parabola
x2 + 16y = 0.
Show that the circle touches the diretrixs of
the parabola.​

Answer 1

Step-by-step explanation:

Coordinate of foci are (± ae, 0) a = 4, b = 3, e = √(1 - 916) = √(7)4 Radius of circle = √((ae)2 + 32) = √(16) = 4 Equation of circle (x - 0)2