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Solução_Calculo_Stewart_6e

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F.<br />

TX.10<br />

12 ¤ CHAPTER 1 FUNCTIONS AND MODELS<br />

47. We need to solve the given equation for y. x +(y − 1) 2 =0 ⇔ (y − 1) 2 = −x ⇔ y − 1=± √ −x ⇔<br />

y =1± √ −x. The expression with the positive radical represents the top half of the parabola, and the one with the negative<br />

radical represents the bottom half. Hence, we want f(x) =1− √ −x. Note that the domain is x ≤ 0.<br />

49. For 0 ≤ x ≤ 3, the graph is the line with slope −1 and y-intercept 3,thatis,y = −x +3.For3

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