Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
given f(x)=9x/(8x+16) , find (f(4)-f(1))/(4-1)
given f(x)=9x/(8x+16) , find (f(4)-f(1))/(4-1)
Natural Language
Math Input
Extended Keyboard