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?
so what you're doing is plugging (1+h) into 3x^2 to get 3(1+h)^2 ??
Originally Posted by Deadstar
and thanks for the help!!
Yeah, see what I think is going on in the question is you are being asked to find the slope of the curve at the point (1,3).
Originally Posted by euclid2
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.