Completeness of a set of basis vectors in 3D Euclidean space.

bossman007
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Homework Statement



The problem is Exercise 2 in the picture

[PLAIN]http://postimage.org/image/3ou3x1sh7/ [/PLAIN]

Homework Equations



The hint says: can you express and three-dimensional vector in terms of just two linearly independent vectors?

The Attempt at a Solution



I have no idea where to begin...
 
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does this have to do with gram-schmidt processes? Any tips on just how to begin? I find my hint very confusing because this is a meth methods in physics class that moves at a pace faster than an F1 fighter jet :(
 
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There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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