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13. Manual de matematica preuniversitaria autor Marilina Carena

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Respuestas

4. (a) (−2, 3) ∪ [0, 5] = (−2, 5]; (−2, 3) ∩ [0, 5] = [0, 3).

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(b) [3, 8) ∪ [8, 11] = [3, 11]; [3, 8) ∩ [8, 11] = ∅.

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(c) (−3, 2] ∪ [2, 6) = (−3, 6); (−3, 2] ∩ [2, 6) = {2}.

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Subsección 2.3.4

1. (a) 15

(b) 7

(c) −8

(d) 4

(e) −4

(f) 4

2. (a) ∣x − 2∣ = {

(b) 2∣3 − x∣ + 5 = {

(c) ∣2y − 3∣ − 1 = {

(d) −4∣x + 1∣ = {

(e) ∣ − x − 1∣ + 2 = {

x − 2, si x − 2 ≥ 0,

2 − x, si x − 2 < 0.

−2x + 11, si 3 − x ≥ 0,

2x − 1, si 3 − x < 0.

2y − 4, si 2y − 3 ≥ 0,

−2y + 2, si 2y − 3 < 0.

−4x − 4, si x + 1 ≥ 0,

4x + 4, si x + 1 < 0.

−x + 1, si − x − 1 ≥ 0

x + 3, si − x − 1 < 0

3. A continuación, graficamos los conjuntos A, B y C, respectivamente:

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4. A continuación, graficamos los conjuntos A, B y C, respectivamente:

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