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If the circles (x + 1) 2 + (y + 2) 2 = r 2 and x 2 + y 2 – 4x – 4y + 4 = 0 intersect at exactly two distinct points, then

1. 2 1 < r < 7
2. 3 < r < 7
3. 5 < r < 9
4. 0 < r < 7

Correct answer: 3 < r < 7

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