Buktikan nPr n-rPk = nPr+k tolong dibantu ya kak :)
Matematika
idhamipute
Pertanyaan
Buktikan nPr n-rPk = nPr+k
tolong dibantu ya kak :)
tolong dibantu ya kak :)
1 Jawaban
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1. Jawaban Kilos
nPr . (n-r)Pk = n!/(n-r)! * (n-r)!/(n-r-k)!
= n!/(n-r-k)!
= n!/(n-(r+k))!
= nP(r+k)
Terbukti.