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2 - VÅ EM

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P.: Urete, kde funkce f: y = x 4 2<br />

xx<br />

f ( x)<br />

e + nabývá lokálních extrém.<br />

f<br />

(<br />

x)<br />

<br />

e<br />

xx<br />

2<br />

(1<br />

2x)<br />

<br />

e x x<br />

2<br />

(1<br />

2x)<br />

<br />

0<br />

<br />

x<br />

<br />

0,5<br />

x<br />

(– ; 0,5)<br />

0,5<br />

(0,5; )<br />

f ´(x)<br />

+<br />

0<br />

–<br />

f(x)<br />

maximum<br />

f(0,5) = e 0,25<br />

Funkce f je na intervalu (-; 0,5) rostoucí, v bod 0,5 nabývá svého<br />

maxima o hodnot e 0,25 , na intervalu (0,5; ) je klesající.

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