The circles and intersect each other in two distinct points if

MATHEMATICS · Single correct · ISC · Mathematics · Coordinate Geometry · Coordinate Geometry

Problem

The circles

x^2+y^2-10x+16=0

and

x^2+y^2=r^2

intersect each other in two distinct points if (1)

r<2

(2)

r>8

(3)

2<r<8

(4)

2\le r\le8