Question

26. Cho A = / \(x\in R\) : x +2 \(\ge\) 0 / . B= / x \(\in\) R : 5 - x \(\ge\) 0 / . Khi đó A\ B là ?

Answer 1

A\ B = [ 5 ; +\(\infty\) ]

Answer 2

A\B = (- ∞; -2)