On the attractivity properties for the equation $x'' + aleft( t ight)f_1 left( x ight)g_1 left( {x'} ight)x' + bleft( t ight)f_2 left( x ight)g_2 left( {x'} ight)x = eleft( {t,x,x'} ight)$

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[效力级别] [学科分类] 数学（综合）

[关键词] [时效性]

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