1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Derivative of (((x-2)/(x+12))/2)^3/2

  1. Mar 8, 2012 #1
    1. The problem statement, all variables and given/known data


    However, according to the online hw program, I was supposed to get this answer:


    Question 1: Is my answer incorrect?

    Question 2: Assuming my answer is also correct, how could I approach/evaluate this function in order to get the preferred answer of the hw assignment?
    Last edited: Mar 8, 2012
  2. jcsd
  3. Mar 8, 2012 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    There's an extra /2 in the thread title. Is that supposed to be there? That "10" is wrong, so you need to check that part of the calculation. You may also want to practice writing the number 2 so that it doesn't look like ∂. :wink:
  4. Mar 8, 2012 #3
    Yep, that extra two in the title means i've been up for two hours too long lol. And because I didn't distribute the negative sign correctly when applying the quotient rule, I got a 10 in the numerator when I should have gotten a 14, which would have then yielded the right numerator (14(3))/2 = 21. Appreciate your help on this problem.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook