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设f（x)＝22＋3x－2，则当x→0时（)．A．f（x)是x等价无穷小B．f（x)与x是同阶但非等价无穷小C．f（x)比x更高阶

设f(x)＝22＋3x－2，则当x→0时()．

A．f(x)是x等价无穷小

B．f(x)与x是同阶但非等价无穷小

C．f(x)比x更高阶的无穷小

D．f(x)是比x较低阶的无穷小

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