need help asap

[dugan]

consider the function q(x) = x^3 - x^2 - 8x + 6

a) find q(3)
b) write the definition of derivative as it applies to q at x = 3
c) substitute the value of q(x) and q(3) into the definition from (b)
d) simplify the ressulting rational expression, and take the limit.[/tex][/url]

 

[stapel]

a) Plug "3" in for "x". This is just algebra. Where are you stuck?

b) The book gave you a "limit" definition for the derivative. Plug "q(3)" into that. (I can't see your book, so I don't know what else you need. It might be "q(3 + h)" or "q(x + delta-x)" or something else. And I don't know what you're supposed to divide by in your limit expression. But whatever the formula is, just plug into it.)

c) This is just plug-n-chug. Where are you stuck?

d) Simplifying complex fractions is algebra. Where are you stuck?

Please reply showing all of the steps you have attempted thus far. Thank you.

Eliz.