the domain is x>2, so 3 is ok.

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- July 11th 2010, 06:57 AM #1

- July 11th 2010, 07:09 AM #2

- July 11th 2010, 07:22 AM #3

- July 11th 2010, 07:25 AM #4

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- July 11th 2010, 07:43 AM #5