I need help gettin from(adsbygoogle = window.adsbygoogle || []).push({});

(n-1)((1/r1^3)-(1/r2^3))(y^4/8) = (y^4/32f^3)

r1 and r2 have the 1 and 2 and subscript and are not numbers.

Question states r1 = f

Supposed to end up with

r2 = ((4n-4)/(4n-5))^(1/3)) * f

Can any one show me the steps?!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Help manipulating equation!

**Physics Forums | Science Articles, Homework Help, Discussion**