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The points C and D on a semicircle with ...

The points C and D on a semicircle with AB as diameter are such that AC=1, CD=2, and DB=3. Then the length of AB lies in the interval

A

[4,4.1]

B

[4.1,4.2]

C

[4.2,4.3]

D

`[4.3,infty]`

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