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13. Manual de matematica preuniversitaria autor Marilina Carena

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Respuestas

Sección 5.6

1. .

5 x e x

10 x x

1

−2 −1 1 2

2. Los gráficos son los siguientes:

(a)

16

(b)

16

14

12

10

2 x+4 2 x + 4

8

2 x

14

12

10

8

2 x 2 x−4 2 x−4 + 4

6

6

4

4

2

2

−6 −5 −4 −3 −2 −1 1 2 3 4

−3 −2 −1 1 2 3 4 5 6 7 8

(c)

6

(d)

6

5

4

3

2

2 x+1 2 x

−2 x−1

( 1 2 )x+4

5

4

3

2

2 x

1

1

−3 −2 −1 1 2 3 4

−1

−2

−3

−4

−7 −6 −5 −4 −3 −2 −1 1 2 3

−1

− ( 1 2 )x+4 −2

−3

−4

3. a = 5 4. a = 2 5. c = 3 6. k = −2 7. h = 2, k = 1

8. (a) x = 1

(b) x = 7

(c) x = ln 3 ≈ 1.1

(d) x 1 = −1, x 2 = 2

344

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