Simple problem... rearranging fractional exponent expression

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April 13th 2010, 02:52 PM
Ares_D1

Simple problem... rearranging fractional exponent expression

This should be simple. Show that

$(\frac{2meE}{h^2})^{1/3}x = (\frac{2m}{h^2 e^2 E^2})^{1/3}eEx$

For some odd reason, I can't seem to get it. Any ideas?
April 13th 2010, 02:58 PM
Deadstar

Quote:

Originally Posted by Ares_D1

This should be simple. Show that

$(\frac{2meE}{h^2})^{1/3}x = (\frac{2m}{h^2 e^2 E^2})^{1/3}eEx$

For some odd reason, I can't seem to get it. Any ideas?

$\bigg{(}\frac{2meE}{h^2}\bigg{)}^{1/3}x = \bigg{(}\frac{2meE}{h^2} \cdot \frac{e^2}{e^2} \cdot \frac{E^2}{E^2}\bigg{)}^{1/3}$

$= \bigg{(}\frac{2me^3E^3}{e^2 E^2 h^2}\bigg{)}^{1/3}x = \bigg{(}\frac{2m}{h^2e^2 E^2}\bigg{)}^{1/3}eEx$

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