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  4. Letf(n) = 8n - 3n if n is odd natural number then f(n) is divisible by

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Q. Let$f\left(n\right) = 8^{n} - 3^{n}$ if n is odd natural number then $f\left(n\right)$ is divisible by

Principle of Mathematical Induction

Solution:

Correct answer is (c) $5$