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Express nPn−3 without using factorials?

Science & Mathematics by Anonymous 2018-06-16 19:03:40

Social Science

Express nPn−3 without using factorials?

3 answers

  • Anonymous

    nPn−3 = nPn - 3 = [k = 1 to n]∏(k) - 3 nP(n-3) = [k = 4 to n]∏(k)

  • Anonymous

    rule nPr = n! / (n - r)!

  • Anonymous

    Ans. nP(n-3)=n(n-1)(n-2)...(6)(5)(4).

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