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Among II and III. Which one is decidable ? Please explain in detail.

in Theory of Computation by Active (2.4k points)
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2. Decidable

3. Undecidable

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1. Decidable, membership problem for all language except RE is decidable

2. Decidable, run TM on all strings of length atmost k for k steps and accept if TM accepts at least one of the strings.

3. Undecidable, can be reduced to state entry problem.
by Active (2.2k points)

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