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Discussion Response Post to: sir!!pls. answer

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20 Mar 2007 22:13:30 IST

Subject: sir!!pls. answer

deep01 (42)

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Let a_n=(111------1) this 1 is n times

(A) a₉₁₂ is not prime

(b)a₉₅₁ is not prime

(D) a₉₁ is not prime

sir pls answer my question and pls also give the proper explanation as i don't how to solve such types of question.

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