I solving a proof dealing with the set of irrational numbers.

cpl1992
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Homework Statement



Let x,y,t be in the set of all real numbers (R) such that x<y and t>0. Prove that there exists a K in the set of irrational numbers (R\Q) such that x<(K/t)<y

Homework Equations



if x,y are in R and x<y then there exists an r in Q such that x<=r<y

The Attempt at a Solution


0<x<y implies that 0<(1/y)<(1/x)
 
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Hint: if you choose some specific irrational such as \sqrt{2}, then the sum of this number plus any rational is irrational.
 
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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