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18. Prove that neN 1) 50"-49n-1 is ...
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18. Prove that neN 1) 50"-49n-1 is divisible by 492 ii) 54n + 52n – 1 is divisible by 676. BINOMIAL THEOREM
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( 5^{4 n}+52 n div 1 ) is divisible by 676
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