а) {x | x ∈ R, x <= 0 и x >= -3}
б) {x | x ∈ R, x >= -2}
в) {x | x ∈ R, x <= 2 и x >= -1}
г) {x | x ∈ R, x >= -3}
д) {x | x ∈ R, x <= 9}
е) {x | x ∈ R, x <= 0 и x >= -7}