1-cos(x^(1/2))的等价无穷小是谁?

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1-cos(x^(1/2))的等价无穷小是谁?

1-cos(x^(1/2))的等价无穷小是谁?
1-cos(x^(1/2))的等价无穷小是谁?

1-cos(x^(1/2))的等价无穷小是谁?
(1-cox)~x*x/2
1-cos(x^(1/2))~x/2