Domains and Absolute Value?

Test Preparation AP Test Preparation
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<p>Finishing up my reviewing tomorrow, and on the FRQ 2006:
<a href="http://www.collegeboard.com/prod_downloads/ap/students/calculus/ap06_sg_calculus_ab.pdf%5B/url%5D"&gt;http://www.collegeboard.com/prod_downloads/ap/students/calculus/ap06_sg_calculus_ab.pdf&lt;/a&gt;&lt;/p>

<p>On Number 5 B), I don't really understand how the Domain works out :/</p>

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<p>Oh, and another thing is, when is a good time to plug in the (-1, 1) to find the Constant (in this case K)? Just after all the crazy is over, or can it be whenever? When is a “good” time?</p>

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<p>Well now it’s too late, I’m just going to get that 5 tomorrow :D</p>