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: Show that

  1. Jan 15, 2007 #1
    show that
    (a+b+c)^3=a^3+b^3+c^3
    implies that
    (a+b+c)^5=a^5+b^5+c^5
     
  2. jcsd
  3. Jan 15, 2007 #2

    matt grime

    User Avatar
    Science Advisor
    Homework Helper

    What have you tried to do?
     
  4. Jan 15, 2007 #3

    berkeman

    User Avatar

    Staff: Mentor

    Moved to homework forum.
     
  5. Jan 15, 2007 #4
    The first step you could do is put in numbers and verify it works numerically =).

    Let's say

    x * y^2 = x * y * y
    x = 3, y = 2

    3 * 2^2 = 12. (3 * 4 = 12)
    3 * 2 * 2.

    3 * 2 * 2 = 3 * 4 = 12
    3 * 2 = 6 -> 6 * 2 = 12.

    Thus, they are the same since they end up with the same answer =).
     
    Last edited: Jan 15, 2007
  6. Jan 15, 2007 #5

    cristo

    User Avatar
    Staff Emeritus
    Science Advisor

    But that's not a proof; that's just showing it for certain numbers.

    ashrafmod: have you tried anything?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...