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OpenStudy (anonymous):
Give a grammar to accept this language: L={w ∈ {a,b}* | nₐ(w) = 2* nb(w)} , (nₐ(w) means the number of a's in w, nb(w) means number of b's in w.) , need an explanation on how to approach this kind of problems
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OpenStudy (anonymous):
\[L={ w \in {a,b}* | n _{a}(w) = 2*n _{b}(w) }\]
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