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I. Aflați x € Z:
1) |x-3|<7
2) |x+13<sau egal 9|
3) |x+14|-5<sau egal 7
4) |x-17|-19<-2
II. Aflați x, y € Z
|2y-8| + |x-9| =0
III. Aflați x + Z daca:
1) 4/x+2 € Z
2) A={x € Z | 2/x-1 € Z}​

Răspuns :

Galinagatlan75

Răspuns:

I.

1) \( x \in (-4, 10) \)

2) \( x \in [-22, -4] \cup [0, 2] \)

3) \( x \in [-12, -9] \cup [2, 7] \)

4) \( x \in [-2, 0] \)

II. There is no solution for \(x\) and \(y\) in the integers that satisfies the equation \(|2y-8| + |x-9| = 0\).

III.

1) No solution for \(x\) in integers for \(4/(x+2)\).

2) \( x \in \{-1, 0, 3\} \)