<p>So on the USC Fall 2012 book list, Math118 requires Hoffmann's Calculus for Bus,Econ & Soc Life Sci Brief (Isbn: 9780073532387). That can be purchased at the bookstore for $178.50. However, I went on eBay and found the same book, but an international edition for around $50. I've read other posts about people not suggesting students buy international editions for subjects like math where there are practice problems, and then I've read other posts which say international edition is okay. Any input would be amazing and very helpful, because I'm also thinking of going international edition for my other classes as well.Thank you!</p>
<p>You can buy a used copy of the U.S. edition. It’s not an either/or situation.</p>
<p>International editions don’t always have the same questions/answers in the back. In a math class, if they aren’t the same the book is worthless to you. Sometimes they’re the same, sometimes they aren’t. No easy rule. I think they work more often than not. You should probably search for feedback on the exact book. And make sure you get the same edition.</p>
<p>I’ve never had a problem with an international textbook, from my experience, every single one was the exact same book as the normal edition.</p>
<p>Even for subjects like math, which might have different practice problems at the end of the chapter?</p>