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I'm confused by this

  1. Aug 22, 2016 #1
    • Member warned to provide more thoughtful titles
    1. The problem statement, all variables and given/known data
    I know this is the rule, but I find this very confusing. A negative power, surd, exponent is converted to a positive fraction power. As I said I find this very confusing as a negative is converted to a positive by the addition of a one over it.

    2. Relevant equation
    n -2 into n1/2
    I can't see the logic in this.
    3. The attempt at a solution
  2. jcsd
  3. Aug 22, 2016 #2


    Staff: Mentor

    Nor is there any, because it isn't true.
    ##n^{-2} = \frac 1 {n^2}##, not ##n^{1/2}##
    Your textbook should give some information about how negative exponents are defined.
  4. Aug 22, 2016 #3
    I don't understand the rule to which you are referring. And I don't understand your terminology where you said,
    Are you dividing n1/2 by n-2?
  5. Aug 22, 2016 #4
    You are correct. n-2 is not equal to n1/2.
  6. Aug 23, 2016 #5
    Thanks Mark, I downloaded a vid now I understand
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