<p>It doesn't always refer to vectors; it's often used in equations as well. (For instance, the modulus of +-sqrt2 is always the positive version of sqrt2.) I could have sworn questions like these appear on the SAT I as well, btw.</p>
<p>It doesn't always refer to vectors; it's often used in equations as well. (For instance, the modulus of +-sqrt2 is always the positive version of sqrt2.) I could have sworn questions like these appear on the SAT I as well, btw.</p>