当 (f(x) ightarrow 0) 时,有: [egin{align} sin f(x) &acksim f(x) onumber \ an f(x) &acksim f(x) … Continue reading 20210901常用等价无穷小
当 (f(x) ightarrow 0) 时,有: [egin{align} sin f(x) &acksim f(x) onumber \ an f(x) &acksim f(x) … Continue reading 20210901常用等价无穷小