Question

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Answer 1

Explicație pas cu pas:

-4 < 2x-1 < 4

2x - 1 > - 4

2x > - 4 + 1

2x > - 3

x > - 3/2

x > - 1,5

2x-1 <4

2x < 4+1

2x <5

x < 5/2

x < 2,5

S = { - 1, 0, 1, 2}

Suma = - 1 + 0 + 1 + 2 = 2