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- Dec 7th 2008, 06:09 AM #1

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- Dec 7th 2008, 11:45 PM #2

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- Dec 8th 2008, 12:14 AM #3

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- Dec 8th 2008, 12:15 AM #4

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- Dec 8th 2008, 12:22 AM #5

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- Dec 8th 2008, 12:27 AM #6

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I'm not sure I do.

If , is the commune of f(x) x>1? If this is what you mean then commune I take to mean domain of x. I fear though this is not exactly what you mean. Try looking around online for different vocabulary to use. I'm sorry I don't quite get you. Maybe someone else will and I'm missing something.

- Dec 8th 2008, 12:29 AM #7

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- Dec 8th 2008, 12:39 AM #8

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- Dec 8th 2008, 12:45 AM #9

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- Dec 8th 2008, 12:51 AM #10

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Oh, then I think you're referring to the range. Determining the range may be a bit tricky so we refer to a graph.

I attached the graph of the second expression.

As you can see, the y values covered are

I hope I understood you correctly. You may want to refer to these terms as domain ("beginning commune") and range ("end commune").

- Dec 8th 2008, 01:16 AM #11

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is the set for which the logarithm is defined. But not all of the range is defined for the square root. Therefore, A is not the domain set.

however, is the set for which the logarithm are greater than or equal to zero. This is the domain set for the expression. Note that

- Dec 8th 2008, 05:47 AM #12

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