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Check whether \( (26)^{n} \) can end with he digit 5 for any ∀ n ∈ N. |
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Answer» (26)n unit digit of 26 is 6 ∴ unit digit of (26)n is 6 ( ∵ 6n always ends with 6) Hence, (26)n always ends with digit 6\(\forall n\in N\). ∴ (26)n never be end with digit 5 Or for no value of n, (26)n ends with digit 5. |
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