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Solução_Calculo_Stewart_6e

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F.<br />

For c =1the level curves are circles centered at the origin.<br />

SECTION TX.1015.1 FUNCTIONS OF SEVERAL VARIABLES ET SECTION 14.1 ¤ 171<br />

c =1(level curves in increments of 1)<br />

When c>1, the level curves are ellipses with major axis the y-axis, and the eccentricity increases as c increases.<br />

c =2(level curves in increments of 4)<br />

For values of c

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