Determine an expression, in simplified form, for the slope of the secant PQ
a) , where
Now, i know which formula to use, which is
i have the solution to this problem, but don't understand where the numbers are coming from so it's useless to me. i don't understand how to plug the numbers into this formula
for the first step it is:
then simply simplifying to get
can someone please explain this to me?
Now you can do this simply by differentiating f(x) (= 6x) and plugging in x=1.
But it seems they want you to use the formula...
Read this to learn more.
Derivative - Wikipedia, the free encyclopedia
Since we are using x=1 (as in P(1,3)).
Plug x into the above formula and just expand it.