

combinatorics
Presentation
•
Mathematics
•
1st - 10th Grade
•
Medium
Mirzad Kesko
Used 2+ times
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6 Slides • 4 Questions
1
Kombinatorika
Mirzad Kesko
mirzadkesko1999@gmail.com
2
Kombinatorika
Kombinatorika je grana diskretne matematike koja se bavi diskretnim strukturama koje su finitne ili koje se mogu prebrojati.
Povezana je s mnogim drugim granama matematike, poput algebre, teorije vjerojatnoće i geometrije kao i raznim područjima u računarstvu i statističkoj fizici.
3
Multiple Select
Kod kojih starih civilizacija još susrećemo elemente kombinatorike?
Indijaca
Maya
Kineza
Arapa
Azteci
4
Faktorijeli
Umnožak prvih n prirodnih brojeva označavamo n! i čitamo "n faktorijela".
Dakle:
1! = 1, 2! = 2*1 = 2, 3! = 3*2*1 = 6, 5! = 5*4*3*2*1 = 120
Po definiciji stavljamo 0!=1.
Faktorijeli zadovoljavaju rekurzivnu formulu
n! = n*(n-1)!
5
Multiple Choice
Izračunajte 8!10!=?
40240
90
180
324
6
Binomni koeficijent
7
Multiple Choice
Izračunati (37)=?
(37)=3!⋅(7−3)!7!=3!⋅4!7⋅6⋅5⋅4!=1⋅2⋅37⋅6⋅5=7⋅5=32
(37)=3!⋅(7−3)!7!=3!⋅4!7⋅6⋅5⋅4!=1⋅2⋅37⋅6⋅5=7⋅5=35
8
Princip uzastopnog prebrojavanja
Ako možemo birati prvi element na a1 načina,
drugi element na a2 načina,
n-ti element na an načina,
tada je ukupan broj načina na koji možemo birati uređenu n-torku jednak
a1*a2*....*an.
9
Varijacije bez ponavljanja
10
Poll
Koliko se dvocifrenih brojeva može napisati od cifri 1,2,3,4,5, ako svaku cifru smijemo iskoristiti samo jednom?
15
V52 = 2⋅5 = 10
V52 = 5⋅4=20
5! = 5*4*3*2*1 = 120
Kombinatorika
Mirzad Kesko
mirzadkesko1999@gmail.com
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