Computer Science · Theory of Computation
Let string concatenation be denoted by juxtaposition. If u = '1101' and v = '0001', then uv = '11010001' and vu = '00011101'. What is the identity element for string concatenation?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1ε (empty string)✓
- 2u-1v-1
- 3v-1
- 4u-1
Correct answer
ε (empty string)
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