Math Help In Calculus
May 9th, 2011
Question: Help With Math/calculus?
I am in calculus 151. I have worked a problem down to: (7-8x^2)/(x^3). I don’t know what to do from here. I feel as if it is easy, but I’m having some trouble.
I know I need to simplify and solve for x, but I’m not sure where to go from here.
That’s what I started with, and I got it to this. I go to Ohio State, and this is the first calculus for me. I just need to solve for x to find the domain.
Wow, I can’t believe I didn’t see that, I’m not thinking tonight, waaaay too many of these problems.. thanks a lot man
Answer: You sound like you might go to Rutgers, since that’s the name of Calculus 1 for engineers at Rutgers.
This is not really simplifying but you can write this as:
(7 – 8x^2)/(x^3) = (7/x^3) – (8x^2)/(x^3) = (7/x^3) – (8/x).
EDIT: If this is your function then the domain is trivial. It would just be all real numbers except 0. i.e.
(-infinity, 0)U(0, infinity)
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