Question: Let L_2 = { : M is a TM, k is a positive integer, and there exists an input to M that makes M run

Let L_2 = {: M is a TM, k is a

Let L_2 = {: M is a TM, k is a positive integer, and there exists an input to M that makes M run for at least k steps}. Prove that L_2 is decidable

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