Algebra 2 Cato.docx

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1.- Resuelva:

5.- Resuelve: √3 βˆ’ π‘₯ < 2

8π‘₯ + 10 3π‘₯ βˆ’ 9 10π‘₯ + 2 ≀ < 4 3 8 a) 𝑐𝑠 = ]βˆ’11; βˆ’

13 [ 2

c) 𝑐𝑠 = ]βˆ’

11 13 ; 2[ 2

b) 𝑐𝑠 = ]βˆ’13; βˆ’

11 [ 2

d) 𝑐𝑠 = ]βˆ’13;

13 [ 2

2.- Si el polinomio π‘₯ 3 βˆ’ π‘₯ 2 βˆ’ 4π‘₯ + 4 se puede representar por (π‘₯ + π‘Ž)(π‘₯ + 𝑏)(π‘₯ + 𝑐), tal que a > b > c. Halle: 2a+b-c a) b) c) d)

-2 5 -1 3

3.- Sea la ecuaciΓ³n cuadrΓ‘tica: π‘₯ 2 βˆ’ (π‘š βˆ’ 12)π‘₯ + 5 = 0; que representa como conjunto soluciΓ³n el mismo valor numΓ©rico con signos opuestos, halle β€œm” a) b) c) d)

12 13 14 15

4.- sean los siguientes intervalos: 𝐴 = [3; 7]

𝐡 = ]2; 20]

𝐢 = ]6; 10[

𝐷 = [9; +∞[

Halle (𝐴 ∩ 𝐡) βˆ’ (𝐢 ∩ 𝐷) a) ]2; 9[

c) ]10; 12]

b) [2; 12]

d) ]2; 9[ βˆͺ [10; 12]

a) b) c) d)

[3; 7⟩ βŸ¨βˆ’3; 3] βŸ¨βˆ’1; 3] [3; +∞⟩

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