Question

Determinati x apartine N astfel încât : X supra2 < 20 supra x < x supra 1,7

Answer 1

[tex]I:{x}{2}\ \textless \ \frac{20}{x} /*x \\ x^{2} \ \textless \ 40 \\x=1,2,3,4,5,6[/tex]
$II: \frac{20}{x} \ \textless \ \frac{x*17}{10} /*x \\ x^{2} \ \textless \frac{200}{17}\\x<28,5\\x=1,2,3,4,5$
$\\din I si II => x=1,2,3,4,5$