Question

10.fie multimile a={x|x apartine N si 2x<=7} si b={x|x apartine N* si x+2<5} a)scrieti elementele celor doua multimi b)stabiliti daca ACB sau BCA

Answer 1

Explicație pas cu pas:

a)

$2x \leqslant 7 \iff x \leqslant \frac{7}{2}$

$\implies A = \{0,1,2,3\}$

$x + 2 < 5 \iff x < 5 - 2 \implies x < 3$

$\implies B = \{1,2 \}$

b)

$\{1,2 \} \subset \{0,1,2,3\} \implies \bf B \subset A$