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Samenvatting Wiskunde B H9 Logoritmen VWO - Formuleblad

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Hoofdstuk 9: Exponentiële en Logaritmische functies van Getal en ruimte WisB deel 3.

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5

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Hoofdstuk 9
Uploaded on
January 28, 2023
Number of pages
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Written in
2022/2023
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5VWO – Wis B
H9 Logoritmen

Wiskunde B Voorbereiding TW2

9.1 Logoritmen
Theorie A De Logaritme & Theorie B Logaritmische vergelijkingen
- In glog(x)  x = g?  Het antwoord op het vraagteken geeft het antwoordt op glog(x) = ?.

Theorie C De grafiek van y = glog(x)
- G Kan nooit kleiner zijn dan 0
- Bij 0 < g < 0 geldt = dalend en voor g > 1 geldt = stijgend

Theorie D Overgaan op grondtal 10
- Gglog(x)  x
g
- log(ga) = a
g
log (a)
- log(a) =
log ⁡(g)

Theorie E De Grafiek van y = glog( ax + b)
- Bereken eerst het domein: ax + b > 0
- Daarna de verticale asymptoot: ax + b = 0 en teken die als stippellijn

Theorie F de vergelijking
- ax = c  x = glog(x)

9.2
Theorie A Rekenregels voor logoritmen
- Voor g>0, g /= 1, a > 0 en b > 0 geldt:
o glog( a) + glog( b ) = glog( ab)
o glog( a) - glog( b) = glog( a/b )
o n x glog( a) = glog( a n )

Theorie C Overgaan op ander grondgetal
g
p log (a)
- log( a) =
P log ⁡( g)
1/ g
- log( a) = - glog( a)
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