Question

pls help
A={x element N\ 3mai mic sau egal radical xmai mic 4}​

Answer 1

Explicație pas cu pas:

$3 \leqslant \sqrt{x} < 4$

${3}^{2} \leqslant {( \sqrt{x} )}^{2} < {4}^{2}$

$9 \leqslant x < 16$

=> x ∈ {9, 10, 11, 12, 13, 14, 15}