What are the steps to find the derivitive of a function, such as: f(x) = x3 - 9x + 8
i know the formula is f(x)-f(x)/x-a
but idk how to use it
The correct formula is . That is not at all what you wrote. In the first place, you don't have a limit. In the second, you have "- f(x)" instead of "f(a)". And finally, "f(x)- f(x)/x-a", without parentheses, means "
In any case, you need to find
If you use the fact that that will be fairly easy.