Cunediogluyelizrans
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soru: 4.P(3, 2) + 2.P(4, 4) = (n + 1)! (n-1)! eşitliğini sağlayan n değeri aşağıdakilerden hangisidir?


A) 9 B) 8 C) 7 D) 6 E) 5

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Bersannefiseakdemir8rans

Adım adım açıklama:

4. (3!/((3-2)!.2!))+2.(4!/((4-4)!.4!)=(n+1)!+(n-1)!

4.(6/1.2)+(2.24/1.24)=(n+1)!+(n-1)!

12+2=(n+1).n.(n-1)!+(n-1)!

14=(n-1)!(n^2+n+1)

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