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October 25, 2014

October 25, 2014

Posted by **coried** on Tuesday, August 18, 2009 at 12:56pm.

- Algebra -
**Marth**, Tuesday, August 18, 2009 at 1:03pmYou cannot take the square root of a negative. So f(x) is defined when the contents of the square root are greater than or equal to 0.

x^4 - 16 >= 0

x >= ? and x <= ?

- Algebra -
**Marth**, Tuesday, August 18, 2009 at 1:05pmInterval notation expresses an included endpoint (greater than or equal) with a "[]" and a not included endpoint (greater than) with a "()"

For example, if the domain of x is -2 < x <= 3, then interval notation would be (-2,3].

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