Mathematics · Coordinate Geometry
The circles (x - 1)2 + (y - 3)2 = r2 and x2 + y2 - 8x + 2y + 8 = 0 intersect at two distinct points. Which of the following conditions is correct?
- 12 < r < 8✓
- 2r = 2
- 31 < r < 2
- 4r = 1
Correct answer
2 < r < 8
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