1. Not finding help here? Sign up for a free 30min 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!

Please hint me

  1. Apr 17, 2008 #1
    [SOLVED] please hint me

    1. The problem statement, all variables and given/known data
    28. What is the coefficient of [tex]x^{88}[/tex] from
    [tex](x+1)(x+2)(x-3)(x+4)(x+5)(x-6)...(x+88)(x+89)(x-90)[/tex].

    29. Find x from this equation [tex]\frac{108}{\sqrt{x^2-2916}}=\frac{378-x-\sqrt{x^2-2916}}{x+54}[/tex].


    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Apr 17, 2008 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Hi mercedesbenz! :smile:

    ok … a hint, as you asked for …

    First, try answering: what are the coefficients of [tex]x^{90}[/tex] and of [tex]x^{89}[/tex] ? :smile:
    You can simplify this slightly, before solving it:

    Hint: what is √2916? What is 378/√2916? :smile:
     
  4. Apr 18, 2008 #3
    Thank you so much I've already solved it.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Please hint me
  1. Please help me! (Replies: 11)

  2. Help me please. Today (Replies: 6)

  3. Hint please? (Replies: 6)

Loading...