Question: ( 1 0 points ) A useless state in a pushdown automata is never entered on any input string. Consider the problem of determine whether

(10 points) A useless state in a pushdown automata is never entered on any input
string. Consider the problem of determine whether a pushdown automata has any
useless states. Formulate this problem as a language and show that it is decidable.
Hint: Think about some of properties we learned about context-free grammars.
(10 points) A useless state in a pushdown automata is never

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