2 votes 2 votes Vïšhàl Kúmãr 3 asked Oct 27, 2018 Vïšhàl Kúmãr 3 1.2k views answer comment Share Follow See all 30 Comments See all 30 30 Comments reply Show 27 previous comments Verma Ashish commented Oct 29, 2018 reply Follow Share It all depend on where n is defined... Means whether it is (${a^n}$ ${b^n}$ ; n>0)* or it is (${a^n}$ ${b^n}$)* ;n>0 As it is mentioned in one of the comment by MiniPanda 0 votes 0 votes Gurdeep Saini commented Oct 29, 2018 reply Follow Share comment written by @srestha mam is right and language taken by mam is (an bn)* ;n>=0 0 votes 0 votes Verma Ashish commented Oct 29, 2018 reply Follow Share Yes you are right but constraints on n is not mentioned by questioner... It is already flagged as 'edit necessary' 0 votes 0 votes Please log in or register to add a comment.