139 views

Consider the language $L =\{ ab^2 wb^3 / w$ is an element of $(a+b)^* \}$.

$L$, therefore, is:

1. regular
2. CFL but not regular
3. CSL but not CFL
4. none

L is regular and following is respective regular expression abb(a+b)*bbb. hence A is correct answer!

1
582 views