Tentukan himpunan penyelesaian dari-1 < x + 2 < 5​

Jawaban:

-1 < x + 2 < 5

-1 – 2 < x < 5 – 2

-3 < x < 3

HP= { -3 < x < 3 }

HP = {-3,-2,-1,0,1,2,3,4…}

HP = { x | -3 < x < 3 , x ∈ ℝ}