1) G1[A]: A-› aABe | a В-›Вb | d check every non-terminal (A and B)                                              2) G2[A]: A-› baBε B-› Abb | a need to calculate, First (A-› baB)=? First (A-›ε)=? ,First (B-›…)=?                                     3)  G3[S]:S->Aa |b A->SB B->ab , find first(S-》xxx),first set of each production .

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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1) G1[A]: A-› aABe | a В-›Вb | d check every non-terminal (A and B)                              

               2) G2[A]: A-› baBε B-› Abb | a need to calculate, First (A-› baB)=? First (A-›ε)=? ,First (B-›…)=?                                     3)  G3[S]:S->Aa |b A->SB B->ab , find first(S-》xxx),first set of each production .

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