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!

Exponent Laws Related Homework Question

  1. Sep 9, 2015 #1
    1. The problem statement, all variables and given/known data
    For which non-zero value of x is the equation -x^ -4 = (-x)^ -4 true? Explain.

    2. Relevant equations
    None. Other than applicable exponent laws.

    3. The attempt at a solution
    I know how to use the guess and check method. But I was wondering how to reach the answer faster and how to solve this problem.
     
  2. jcsd
  3. Sep 9, 2015 #2
    There is no value for which it is true.Try and prove it.
     
  4. Sep 9, 2015 #3
    i understand that but could negative numbers like -1 work?
     
  5. Sep 9, 2015 #4
    If you raise any negative to an even power(like -4) it gives something positive.
     
    Last edited: Sep 9, 2015
  6. Sep 9, 2015 #5
    Try to simplify the equation,you will get to -1=1,which of course isn't true.So the equation isn't true for any x.
     
  7. Sep 9, 2015 #6
    Thanks again :D
     
  8. Sep 10, 2015 #7

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    How can you possibly say "I understand" that no value works and then ask if a negative value works?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Exponent Laws Related Homework Question
  1. Exponent laws (Replies: 3)

  2. Laws of exponants (Replies: 4)

  3. Exponent Question (Replies: 19)

Loading...