Find the beginning commune

y=((log2(x-2) ))*1/2 (the first 2 is the base of log)

Find the end (valuation)commune

y=4/(x*2+2)

Results 1 to 12 of 12

- Dec 7th 2008, 07:09 AM #1

- Joined
- Sep 2007
- Posts
- 66

- Dec 8th 2008, 12:45 AM #2

- Joined
- Nov 2005
- From
- someplace
- Posts
- 14,972
- Thanks
- 5

- Dec 8th 2008, 01:14 AM #3

- Joined
- Sep 2007
- Posts
- 66

- Dec 8th 2008, 01:15 AM #4

- Joined
- Oct 2005
- From
- Earth
- Posts
- 1,599

- Dec 8th 2008, 01:22 AM #5

- Joined
- Sep 2007
- Posts
- 66

- Dec 8th 2008, 01:27 AM #6

- Joined
- Oct 2005
- From
- Earth
- Posts
- 1,599

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, 01:29 AM #7

- Joined
- Jun 2008
- Posts
- 792

- Dec 8th 2008, 01:39 AM #8

- Joined
- Sep 2007
- Posts
- 66

- Dec 8th 2008, 01:45 AM #9

- Joined
- Sep 2007
- Posts
- 66

- Dec 8th 2008, 01:51 AM #10

- Joined
- Jun 2008
- Posts
- 792

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, 02:16 AM #11

- Joined
- Jun 2008
- Posts
- 792

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, 06:47 AM #12

- Joined
- Sep 2007
- Posts
- 66