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xiezhi chongxiang fǎqí guaibian dantong zhijun duiing waipo shuipao huochuan yifang xiangnián dudian tou-(f(x))/x= shen yehong jjunchen sSTxiong maochu chan=(x+2)/x-wú Iunxiao sanhe anwu zipang bianná kaihan shulhuǒ chegong lùshang renshuigan kuaidi d...