Use the following to answer questions : a n = 7n + 5 -Find a_k. A) a_k = 7k + 3 B) a_k = 7n + 3 C) a_k = (7n + 3)k D) a_k = (7n + 3) + k

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Given that a_n = 7n + 5, replacing 'n' with 'k' in the formula results in a_k = 7k + 5. However, the correct option A states 7k + 3, indicating a typo in the question or answer choices. Assuming the pattern, the correct formula should indeed change 'n' to 'k', but none of the provided options exactly match the expected outcome based on the given equation. Option A is the closest in structure, suggesting a direct substitution of 'k' for 'n', but with an incorrect constant term.

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