I need some clarification on the instructions for the math section.

Test Preparation SAT Preparation
1

<p>The online course has all sorts of interesting problems.</p>

<p>r(x) = x^2
t(x) = x - 2</p>

<ol>
<li>The functions r and t are defined above. For how
many values of a is it true that r(a) = t(a) ?
(A) None
(B) One
(C) Two
(D) Three
(E) More than three</li>
</ol>

<p>The answer they give is (A) None. I am wondering if for "values" they mean "real values," since there are two imaginary values where r(a) = t(a)</p>

<p>The instructions seem to imply this but don't really specify (at least in my opinion):
1. Calculator allowed blah blah
2. All numbers used are real numbers.
3. Figures are drawn to scale blah blah
4. Unless otherwise specified, the domain of any function f is assumed to be the set of all real numbers x for which f(x) is a real number.</p>

<p>Rule 4 seems to point to REAL VALUES only, but I want to be sure for the real test.</p>

2

<p>Yeah, it’s real values. SAT doesn’t test things as advanced like imaginary numbers</p>

3

<p>Just remember that the math section is fairly simple in topics covered, and won’t be that complex.</p>

<p>Simplicity is your friend on the SAT, both here and on the writing section.</p>