How do you prove that [math]4^n+15^n-1[/math] is divisible by [math]9[/math] using induction?
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How do you prove that [math]4^n+15^n-1[/math] is divisible by [math]9[/math] using induction?
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How do you prove that [math]4^n+15^n-1[/math] is divisible by [math]9[/math] using induction?