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basic squares and roots

bombs away · 2010-08-31 14:21:02

If you have a base (for example 5) with a fraction as the index (i.e 2/3) does this mean that you square it first and then find the cubed root? Basic question I know but I cant get my head around it, maths was never my strong point :(

31-08-2010 2:21pm

#1

bombs away

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Join Date: April 2010

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If you have a base (for example 5) with a fraction as the index (i.e 2/3) does this mean that you square it first and then find the cubed root?

Basic question I know but I cant get my head around it, maths was never my strong point

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Comments

#2 31-08-2010 4:42pm

Michael Collins

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That's the idea yeh but it doesn't matter which you do first

e.g.

[latex] \displaystyle 8^{(2/3)} = (8^2)^{1/3} = (8^{1/3})^{2} [/latex]

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