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← GATE CSE 2015 Set 2

Q51

MCQ2 marks, −0.67

Which of the following is/are regular languages? L1:{wxwR∣w,x∈{a,b}∗ and ∣w∣,∣x∣>0},wR is the reverse of string wL_1: \left\{ wxw^R \mid w, x \in \{a, b\} ^* \text{ and } |w|, |x| > 0\right\}, w^R \text{ is the reverse of string } w L2:{anbm∣m≠n and m,n≥0}L_2: \left\{ a^nb^m \mid m \neq n \text { and } m, n \geq 0 \right\} L3:{apbqcr∣p,q,r≥0}L_3: \left\{ a^pb^qc^r \mid p, q, r \geq 0 \right\}

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