Question

18. Numerele naturale x pentru care: a) 4 < √x < 5 sunt: b) √3​

Answer 1

Răspuns:

x ∈ {17, 18, 19, 20, 21, 22, 23, 24}

Explicație pas cu pas:

$4 < \sqrt{x} < 5$

$\iff \sqrt{16} < \sqrt{x} < \sqrt{25}$

$\implies 16 < x < 25$

x ∈ {17, 18, 19, 20, 21, 22, 23, 24}