Question

Determinati x apartine nr naturale nenule pentru care: 1/10<10/x<1/9
Va rog sa ma ajutati. Dau coroana.

Answer 1

$\frac{10}{x} \ \textless \ \frac{1}{9} =\ \textgreater \ 90\ \textless \ x$$\frac{1}{10} \ \textless \ \frac{10}{x}=\ \textgreater \ x\ \textless \ 100$
=> 90<x<100 => x∈{91,92,93,94,95,96,97,98,99}