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A4-format til udskrift. - Aarhus Universitet

A4-format til udskrift. - Aarhus Universitet

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48 I. DIFFERENTIATION<br />

en ligning for tangenten <strong>til</strong> niveaukurven.<br />

5.31. Gradient og niveaukurve ☞ [S] 11.6 Directional derivatives and the . . .<br />

Bemærkning - figur<br />

y<br />

f(x,y)=k<br />

tangent:<br />

∇f(x0,y0) (x x0,y y0)=0<br />

(x0,y0)<br />

∇f(x0,y0)<br />

Vinkelret på niveaukurverne vokser og aftager funktionen hurtigst.<br />

5.32. Gradient og niveaukurve ☞ [S] 11.6 Directional derivatives and the . . .<br />

Eksempel 6 - figur<br />

y<br />

1<br />

0 1<br />

Tangenter <strong>til</strong> niveaukurver for z = xe y .<br />

5.33. Gradient og niveaukurve ☞ [S] 11.6 Directional derivatives and the . . .<br />

Eksempel 6 - figur<br />

y<br />

1<br />

0 1<br />

Skalerede gradienter 0.1∇z for z = xe y .<br />

5.34. Opgave ☞ Matematik Alfa 1, August 2002<br />

Opgave 5<br />

x<br />

x<br />

x

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