Question

[mr bean]

Tim x

3.5<x>4.5

Answer 1

[Vũ Hương Lan]

3.5 < x > 4.5

15< x > 20

=> x\(\in\){21;22;23;.....}

Vậy x \(\in\){21;22;23;.....}

Answer 2

[phạm văn tuấn]

3.5 < x > 4.5

15< x > 20

=> x∈{21;22;23;.....}

Vậy x ∈{21;22;23;.....}