0时,sin(2x2)与ax2是等价无究小,则a=_________.

"> 0时,sin(2x2)与ax2是等价无究小,则a=_________.

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当x0时,sin(2x2)与ax2是等价无究小,则a=_________.

当x0时,sin(2x2)与ax2是等价无究小,则a=_________.


【正确答案】:2
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