# Discrete Math : Set Relations

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Let SIGMA = {a,b} be an alphabet.

a. List between braces the elemnts of SIGMA4. the set of strings of length over SIGMA.

b. Let A = SIGMA1 U SIGMA2 and B = SIGMA3 U SIGMA4. Describe A, B and AUB in plain English.

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##### Solution Summary

Set relations are investigated. The expert lists between brace elements of SIGMA4. The set of strings of lengths over SIGMA are found.

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a) The strings of length four given the alphabet {a,b} is as ...

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