Question: Let L 1 and L 2 be 2 regular languages. Which of the following do you know is also regular? L 1 L 2 L

Let L1 and L2 be 2 regular languages. Which of the following do you know is also
regular?
L1L2
L1L2
(L1L2)(L1L2)
L1**L2
L1R
Let L1 and L2 be 2 regular languages. Which of the

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