OpenStudy (anonymous):

Let g(x)= 1/(sqr(x-6)) . Evaluate the expression (g(x)- g(10))/(x-10) and then simplify the result. *sqr= square root

5 years ago
OpenStudy (zzr0ck3r):

what is g(10)?

5 years ago
OpenStudy (anonymous):

It;s just g(10). I think the whole expression is for limits, but I can't figure out how to do this.

5 years ago
OpenStudy (zzr0ck3r):

$g(x) = \frac{1}{\sqrt{x-6}}\\g(10) = \frac{1}{\sqrt{10-6}}=\frac{1}{2}$you need $\frac{g(x)-g(10)}{x-10}=\frac{\frac{1}{\sqrt{x-6}}-\frac{1}{2}}{x-10}=\frac{\frac{2-\sqrt{x-6}}{2(x-6)}}{x-10}=\frac{2-\sqrt{x-6}}{2(x-10)(x-6)}$

5 years ago
OpenStudy (zzr0ck3r):

im not sure what you want to do here...

5 years ago
OpenStudy (anonymous):

You just need to simplify it. And how did you get (x-6)? Wouldn't it still be $\sqrt{x-6}$? Not only do we both have different answers, but both are not one of the MC answers.

5 years ago
OpenStudy (zzr0ck3r):

yes it should be sqrt sorry. i hate latex... $\frac{2-\sqrt{x-6}}{2\sqrt{x-6}(x-10)}$

5 years ago
OpenStudy (anonymous):

Nevermind I got the right answer now! I just had to multiply everything out by $\sqrt{x-6}$ so that the bottom would no longer be radical :p!

5 years ago