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: Another Matematical Induction Problem

  1. Dec 17, 2009 #1
    1. The problem statement, all variables and given/known data

    Prove by incuction that for all positive intergers 1/(n(n+1)=(n/(n+1)


    2. Relevant equations



    3. The attempt at a solution

    I have proved this is true for n=1. I need to find a way to set the equation for n+1
     
  2. jcsd
  3. Dec 17, 2009 #2
    Welcome to physicsforums(=

    does it holds for all positive integer?
    can you check for some case like positive integer 5 .

    [tex]\frac{1}{5(5+1)}\neq\frac{5}{5+1}[/tex]
     
  4. Dec 17, 2009 #3

    Mark44

    Staff: Mentor

    Are you sure you have given us the problem exactly as stated. icystrike gave a counterexample to show that the equation above isn't generally true.
     
  5. Dec 17, 2009 #4

    Borek

    User Avatar

    Staff: Mentor

    Note that you are missing two closing parentheses, that suggests something can be wrong with the equation.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook