# Thread: Can not understand question

1. ## Can not understand question

For the function $f(x) = 2x^2 - 3x +9$, what is the correct expression for the value of the difference quotient on the interval 3 <= x <= 3+h?
I really do not understand the question. What is value of the difference quotient???????

2. ## Re: Can not understand question

Originally Posted by sakonpure6
I really do not understand the question. What is value of the difference quotient???????
apparently it's what $\dfrac{f(x+h)-f(x)}{h}$ is called. Its limit as h tends to 0 is the derivative of f(x).

3. ## Re: Can not understand question

Oh wow we have not done calculus yet and there are questions like this in the review.... thank you.

4. ## Re: Can not understand question

Originally Posted by sakonpure6
Oh wow we have not done calculus yet and there are questions like this in the review.... thank you.
Hrm I should pay more attention to what forum these questions are posted in so I don't cause confusion. Thank you.