## Help with negative exponents

Complex numbers, rational functions, logarithms, sequences and series, matrix operations, etc.
chrisfromNJ
Posts: 1
Joined: Tue Feb 08, 2011 8:43 pm
Contact:

### Help with negative exponents

Hello, all.

I am struggling to solve the following equation for r: w = Cr^-2

I started by dividing both sides by C: w/C = r^-2

Next, I converted the radical to a positive: w/C = 1/r^2

Now I can't remember what to do next. I need to solve for r. Am I off track?

Chris

stapel_eliz
Posts: 1628
Joined: Mon Dec 08, 2008 4:22 pm
Contact:
Next, I converted the radical to a positive: w/C = 1/r^2
There aren't any radicals in the equation. I'll guess you mean "the exponent"...?
Now I can't remember what to do next. I need to solve for r. Am I off track?
One method might be to flip both sides; if fractions are equal, then their reciprocals are equal.

Then solve the resulting quadratic equation from there, using whichever method you prefer.

Return to “Advanced Algebra ("pre-calculus")”