<p>Can anybody explain these questions from the Official Study Guide for Math Subject Tests?
(from practice test 1) Thanks so much!</p>
<ol>
<li><p>what value does lnx / x-1 approach as x approaches 1?</p></li>
<li><p>what is the period of y= 2tan(3piex + 4)</p></li>
<li><p>what shift of graph y=x^2 would result in graph of y= x^2 -2x +k where k is constant greater than 2?</p></li>
</ol>