18.09.2015 Views

Den deriverte til en funksjon

Den deriverte til en funksjon

Den deriverte til en funksjon

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<strong>D<strong>en</strong></strong> <strong>deriverte</strong> som <strong>en</strong>dringsrate<br />

Definisjon<br />

<strong>D<strong>en</strong></strong> mom<strong>en</strong>tane vekstrat<strong>en</strong> <strong>til</strong> f i et punkt er lik<br />

f (x) − f (x 0 ) f (x 0 + h) − f (x 0 )<br />

lim<br />

= lim<br />

= f ′ (x 0 )<br />

x→x 0 x − x 0 h→0 h<br />

dersom f er deriverbar i x 0 .

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