Răspuns :

Răspuns:

Explicație pas cu pas:

c)

-1/2 ≤ (4x + 1)/5 < 2/3

-5/2 ≤ 4x + 1 < 10/3

-5/2 - 1 ≤ 4x ≤ 10/3 - 1

-7/2 ≤ 4x < 7/3

-7/8 ≤ x < 7/12

C = [-7/8, 7/12)

f)

-11/6 < (5 - 2x)/6 < 5/3

-11/6 < (5 - 2x)/6 < 10/6

-11 < 5 - 2x < 10

-16 < -2x < 5

-8 < -x < 5/2

-5/2 < x < 8

F = (-5/2, 8)

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