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Why factorial 0 is equal to …

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Why factorial 0 is equal to 1. (0!)equal to 1

    • Posted by Amar Pandey 8 years, 2 months ago

    CBSE > Class 11 > Mathematics
    • 2 answers

    Rahul Poddar 8 years, 2 months ago

    nPr=n!/(n-r)!, let permutations of n dissimilar things taken n at a time then nPr=nPn (r=n), nPn=n!/(n-n)!, nPn=n!/0!, here nPn=n!, n!=n!/0!,0!=n!/n!,0!=1 hence 0!=1

    0Thank You

    Aditya Singh 8 years, 2 months ago

    Since 1power0is equal to 1similarly 0!is also equal to 1

    1Thank You

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