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!

Horid algebra

  1. Jul 29, 2008 #1
    ive got (y-1/y+2)=Ke3/4x4where K=+ or- e3c

    and im trying to get to y=(2Ke3/4x4)/(1-Ke3/4x4)

    but i keep getting y= (-3+Ke3/4x4)/(Ke3/4x4) can someone please have a go at this to see if its me thats wrong or the answer sheet and if its me which it usualy is can you please write your working step by step? thanks
     
  2. jcsd
  3. Jul 29, 2008 #2
    We have:

    [tex]
    \frac{y-1}{y+2}=KL
    [/tex]

    In which [tex]K=\pm e^{3c}[/tex] and [tex]L=e^{\frac{3}{4}x^4}[/tex]

    We now work this out:

    [tex]
    y-1=yKL+2KL
    [/tex]

    [tex]
    y=yKL+2KL+1
    [/tex]

    [tex]
    y-yKL=2KL+1
    [/tex]

    [tex]
    y(1-KL)=2KL+1
    [/tex]

    [tex]
    y=\frac{2KL+1}{1-KL}
    [/tex]

    This does not correspond to the solution you want to get, but in my opinion this is the correct one, maybe you have not given the correct question?
     
  4. Jul 29, 2008 #3
    ye thats right sorry i forgot to put the +1 on the end and that way is about 50^2 times simpler than the way i was trying to do it thanks!
     
  5. Jul 29, 2008 #4
    no problem :smile: sometimes the math becomes easier if you just replace some nasty crap by a single parameter :smile:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Horid algebra
  1. Algebra, permutations. (Replies: 2)

  2. Polynomial Algebra (Replies: 4)

Loading...