Ekwazzjoni differenzjali: Differenza bejn il-verżjonijiet

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Linja 31:
:<math>\frac {P(t+dt)-P(t)} {dt}=(n-m)P(t).</math>
 
Nistgħu nagħrfu f'din l-espressjoni ir-[[rapport inkrementali]] tal-funzjoni <math>{\displaystyle P(t)}</math>; jekk <math>{\displaystyle dt}</math> hu żgħir ħafna li nistġhu nissostitwixxuhnissostitwuh bid-[[id-Derivata|derivata]] <math> {\displaystyle P'(t)} </math> u niktbu:
 
:<math>P'(t)=(n-m)P(t). \!</math>