Question

Me ajude pfvv... Questão 32

Answer 1

32-

a) 1 ≤ x + 1 < 5

1 ≤ x + 1 == > x ≥ 0 (i)

x+1 < 5 ==>x < 4 (ii)

(i) ∩ (ii) ==> 0 ≤ x <4

b)

5-2x ≤ 4 ==> -2x ≤ -1 ==> x ≥ 1/2 (i)

x-5 < 1-x ==> 2x <6 ==>x <3 (ii)

(i) ∩ (ii) ==> 1/2 ≤ x < 3