Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Extract h

  1. Mar 2, 2012 #1
    can someone help me to extract h from the folowing equetion

    V= (∏ tnα² h³)/3 + (∏ tnα d h²)/2 + ( ∏ d² h)/4

  2. jcsd
  3. Mar 2, 2012 #2


    User Avatar
    Science Advisor

    Hey thomasJDN and welcome to the forums.

    It would help if you said what your dummy index was for the multiplication as well as the limits.
  4. Mar 2, 2012 #3
    im sorry i didnt mean extract
    i mean isolate
  5. Mar 2, 2012 #4


    Staff: Mentor

    The equation is a cubic in h, so isolating h entails factoring the cubic, which is nontrivial.
  6. Mar 2, 2012 #5


    User Avatar
    Science Advisor

    yes, but every term contains a h, so the non-zero solutions are the roots of a quadratic, which is somewhat easier.
  7. Mar 2, 2012 #6


    User Avatar
    Science Advisor

    Not if that "V" is non-zero!
  8. Mar 2, 2012 #7


    User Avatar
    Science Advisor

    silly me. you're right of course.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook