# calculate the difference quotient given the function

• Sep 2nd 2010, 11:11 AM
juventinoalex
calculate the difference quotient given the function
Given the function https://webwork.uncc.edu/webwork2_fi...e1a90e35c1.png, calculate the difference quotient https://webwork.uncc.edu/webwork2_fi...01d57e2851.png
Can some one explain this? I plugged in -7/x for f(x) in the problem but then got stuck.

Thanks
• Sep 2nd 2010, 11:52 AM
bigwave
your first step should look like this

$
\frac{\frac{-7}{x}-\frac{-7}{a}}{x-a}$

just finsh with the algrebra
• Sep 2nd 2010, 11:52 AM
Plato
$\displaystyle \frac{\dfrac{-7}{x}-\dfrac{-7}{a}}{x-a}$

Can you do simple algebra?