# I'm confused by this

1. Aug 22, 2016

### Simon Peach

• 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. Aug 22, 2016

### 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.

3. Aug 22, 2016

### TomHart

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?

4. Aug 22, 2016

### TomHart

You are correct. n-2 is not equal to n1/2.

5. Aug 23, 2016