4. Scrieți sub formă de interval de numere reale mulţimea: a) A=(xxe R, 2≤x≤7}; c) C={xER,-7≤x0}; g) G={xxe R, x2-2}; 1) 1 = {xxe R, x>1,3}; b) B={xxe R-5≤x

a) \( A = \{ x \in \mathbb{R} \mid 2 \leq x \leq 7 \} \)
b) \( B = \{ x \in \mathbb{R} \mid x \geq -5 \} \)
c) \( C = \{ x \in \mathbb{R} \mid -7 \leq x \leq 0 \} \)
g) \( G = \{ x \in \mathbb{R} \mid x^2 - 2 \} \)
1) \( 1 = \{ x \in \mathbb{R} \mid x > 1.3 \} \)