not always

but in this case.

but in this case.

0 votes

Let $L_1$ and $L_2$ be languages over $\Sigma$ and assume that $L_1 \cap L_2 = \phi$. if $L_1$ is finite language and $L_1 \cup L_2$ is regular then $L_2$ is ____ ?

a. Regular language and finite

b. Regular language and infinite

c. Need not be regular

d. None of these.

closed as a duplicate of:
plz answer