<p>In a Barron’s Math 2 practice test there’s the following question: for which values of x is the function 1/SQRT(x-1) undefined.</p>
<p>The answer key has: “for x less than or equal to 1”. The mathematically correct answer is “for x = 1”. So I’m unsure whether this is a sloppy question, typo in the answer key, or if Math 2 assumes that test takers are not supposed to know about imaginary numbers.</p>
<p>That’s odd because there are question s with i</p>
<p>I believe that at the beginning of the sectio, at the top, it should say:</p>
<p>“Unless otherwise specified, the domain of any function f is assumed to be the set of all real numbers.” Complex numbers are not included in the domain for the test.</p>
<p>However, the test takers do expect you to have knowledge about complex/imaginary numbers and they are on there. Like say what is i^(9013) or something like that. And you should know how to do absolute value of complex #s too. Stuff like De Moivre’s theorem probably won’t be on there unless CB really tries to screw ppl over this month…</p>