Prove by the mathematical induction method that 7²n +2³n-³.3n-¹ is divisible by 25for all n€N

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Time: 00:01:33
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Rakshith Shetty...

How many times can you subtract 7 from 83, and what is left afterwards? You can subtract it as many times as you want, and it leaves 76 every time.

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