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Texas Instruments ti 84 plus graphing calculator Manual

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Hoofdstuk 2: Wiskundige, hoek- en vergelijkende bewerkingen 88
Opmerking: wanneer u willekeurige getallen wilt genereren die niet tussen 0 en 1 vallen,
kunt u de functie
rand in een uitdrukking gebruiken. Voorbeeld: rand5 genereert een
willekeurig getal dat groter dan 0 en kleiner dan 5 is.
Telkens de instructie
rand wordt uitgevoerd, zal de TI-84 Plus dezelfde rij van
willekeurige getallen genereren op basis van een opgegeven beginwaarde of "zaadje".
De standaardinstelling van de TI-84 Plus voor de beginwaarde van de instructie
rand is
0. Wanneer u een andere rij van willekeurige getallen wilt genereren, moet u een
beginwaarde (die niet nul is) opslaan in
rand. Wanneer u de standaardinstelling van de
beginwaarde opnieuw wilt instellen, slaat u het getal
0 op in rand of volgt u de procedure
om de rekenmachine opnieuw in zijn basistoestand terug te brengen (zie hoofdstuk 18).
Opmerking: de beginwaarde (het "zaadje") zal eveneens bepalend zijn voor het resultaat
van de instructies
randInt( , randNorm( en randBin(.
nPr, nCr
nPr, nCrnPr, nCr
nPr, nCr
De functie
nPr (aantal permutaties) berekent het aantal permutaties van n-getallen telkens
in groepen van
r-getallen. n-getallen en r-getallen moeten niet-negatieve gehele getallen zijn.
Voor zowel
n-getallen als r-getallen kunt u lijsten gebruiken.
n-getallen nPr r-getallen
… 90 …


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