The Gateway to Computer Science Excellence
First time here? Checkout the FAQ!
0 votes

20. Consider the languages L1 = ϕ, and L2 = {1}. Which one of the following represents L1* U L2* L1* ?

(1) {ε}
(2) {ε,1}
(3) ϕ
(4) 1*

asked in CBSE/UGC NET by Active (3.8k points) | 1.2k views

2 Answers

+2 votes
Best answer
option 4

L1 = ϕ, and L2 = {1}
L1 * is also ϕ
L2* will be 1*
so L1* U L2* L1* = 1*
answered by Active (3.8k points)
selected by
L1* is not ϕ but {ε}
0 votes
4 is answer

because l1 is empty so no use of union and l2 is singleton so it will be 4
answered by (71 points)

Related questions

Quick search syntax
tags tag:apple
author user:martin
title title:apple
content content:apple
exclude -tag:apple
force match +apple
views views:100
score score:10
answers answers:2
is accepted isaccepted:true
is closed isclosed:true
49,807 questions
54,504 answers
74,887 users