1
$\begingroup$

I don't get this question from my Calc textbook, can u please explain it to me.

How do you get from $\cfrac{\sqrt{x-3}}{x-3}$ to $\cfrac {1}{\sqrt{x-3}}$?

  • 2
    Multiply the top and bottom of the original expression by $\sqrt{x - 3}$2012-10-31

4 Answers 4