Question

Alguém pode me ajudar?

Answer 1

$2x - 1 < 11 \\ 2x < 11 + 1 \\ 2x < 12 \\ x < \frac{12}{2} \\ x < 6$
x € N

A= {1,2,3,4,5}
B={3,5,6,7}
C={5,6,7,8,9}

a)AhC {5}
b) C-A= {6,7,8,9}
c) AuB={1,2,3,4,5,6,7}