Question

If E and F are regular expressions, then there is a regular expression for the set of strings in L(E)UL(F) where L is the set of strings represented by a regular expression

true
false

Answer 1

Yes, there is a regular expression for the set of strings in L(E)UL(F) where L is the set of strings represented by a regular expression.

Step-by-step explanation:

Yes, there is a regular expression for the set of strings in L(E)UL(F) where L is the set of strings represented by a regular expression. The regular expression for the set of strings in L(E)UL(F) can be obtained by concatenating the regular expressions E, U, and F using the concatenation operator in regular expressions. Here's an example:

Example:

If E = (a+b)* and F = (c+d)*, then the regular expression for the set of strings in L((a+b)*U(c+d)*) is (a+b)*(c+d)*.