A.I(R)是R的一阶无穷小 B.I(R)是R的二阶无穷小 C.I(R)是R

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问题 A.I(R)是R的一阶无穷小B.I(R)是R的二阶无穷小C.I(R)是R的三阶无穷小D.I(R)至少是R的三阶无穷小

选项 A.I(R)是R的一阶无穷小
B.I(R)是R的二阶无穷小
C.I(R)是R的三阶无穷小
D.I(R)至少是R的三阶无穷小

答案 D

解析
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