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[latex] \frac{1}{ \sqrt{2- \frac{ x^{2}}{18} }} [/latex] [latex] \sqrt{2- \frac{ x^{2} }{18} } \ \textgreater \ 0 [/latex] [latex]2- \frac{ x^{2} }{18} \ \textgreater \ 0[/latex] [latex] \frac{ x^{2} }{18} \ \textless \ 2[/latex] [latex] x^{2} \ \textless \ 36[/latex] [latex]x\ \textless \ 6[/latex] и [latex]x\ \textgreater \ -6[/latex] [latex]x=(-6;6)[/latex] 11 целых чисел