S is a set of strings over the alphabet (a, b) and is defined recursively as follows: Basis: AE Sandb E S Recursive rules: If x is in S, then bxa E Sandaxb ES. Select the set that corresponds to all the strings in S of length 4 110 S S

Advanced Engineering Mathematics
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Chapter2: Second-order Linear Odes
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S is a set of strings over the alphabet (a, b) and is defined recursively as follows:
Basis: AE Sandb E S
Recursive rules: If x is in S, then bxa E Sandaxb E S.
Select the set that corresponds to all the strings in S of length 4
1) ø
2) [bbaa, aabb}
3) (baba, abab)
4) [bbaa, aabb, baba, abab}
Transcribed Image Text:S is a set of strings over the alphabet (a, b) and is defined recursively as follows: Basis: AE Sandb E S Recursive rules: If x is in S, then bxa E Sandaxb E S. Select the set that corresponds to all the strings in S of length 4 1) ø 2) [bbaa, aabb} 3) (baba, abab) 4) [bbaa, aabb, baba, abab}
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