If the two circles (x-1)^2+(y-3)^2=r^2 and x^2+y^2-8x+2y+8=0 intersect in two distinct points then

JEE Advanced Mathematics question

If the two circles and intersect in two distinct points then

Answer: (D)

The first circle has centre and radius . The second has centre and radius . The distance between the centres is

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Question ID VK-110069