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13. Manual de matematica preuniversitaria autor Marilina Carena

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4.5. Inecuaciones

4

12. √ (2x + 1) 4 ≤ 5

13. (x − 2)(x + 7)(x − 5)x 2 < 0

14. x 2 − 9x + 14 ≤ 0

15. 5 1−x2 ≤ 5 −3

16.

3√

5

7−x

≤ 5 2

17. (7 2−x ) 4−x < 1

18.

4 x−1

2 x+2 ≥ 128

19. ln(7 − 3x) − ln(1 − x) ≤ ln 5

20. 2 log(x) − log(x 2 − 2x + 6) ≥ 0

21. log(x − 1) + log(3x − 5) < log(2x − 3)

22. ( 1 4 )1−x2 ≤ ( 1 4 )−3

23.

24.

x 2 −9

x−1 ≤ 0

x 2 −1

x 2 ≥ 0

25.

x 2 −3x+2

4−x 2 ≤ 0

26. Factorizar los polinomios adecuados para resolver las inecuaciones dadas:

(a) x 2 + 3x + 2 < 0

(b) x 3 − 2x 2 ≥ 5x − 6

(c) x 3 − 4x 2 + x + 5 ≤ x 2 + 10

(d) x 3 > 9x

27. Ingresar en Ge Gebra las inecuaciones polinómicas del ejercicio anterior

para comparar los resultados obtenidos.

149

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