Tuesday, September 18, 2018

algebra precalculus - What does the notation in this claim, that needs to be proved, mean?



Prove, or disprove using a counter example:


Let p,qR \ Q \, then pq is irrational.


I don't understand what the back slash between the R and Q means.


Answer



The sign means substraction of sets. AB={xA such that xB}.


In your case, RQ is the set of irrational numbers.


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