Computer Science · Theory of Computation
Which of the following regular expressions represents all strings over {a, b} that end with 'ab'?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1abab
- 2ab(a+b)
- 3(a+b)ab✓
- 4(a+b)a(b+a)
Correct answer
(a+b)ab
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