23．已知函数$f(x)$为定义在$R$上的奇函数，且对于$\forall x_{1}$，$x_{2}\in [0$，$+\infty )$，都有$\frac{{x}_{2}f({x}_{2})-{x}_{1}f({x}_{1})}{{x}_{2}{-x}_{1}}>0(x_{1}\ne x_{2})$，且$f$（3）$=2$，则不等式$f(x)>\frac{6}{x}$的解集为 ___$\{x\vert -3<x<0$[或]$x>3\}$___．