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问题详情

微分方程y＂-3y+2y=xex的待定特解的形式是（）。

A、y=（Ax2+Bx）ex

B、y=（Ax+B.ex

C、y=Ax2ex

D、y=Axex

时间：2021-12-29 11:49 关键词：第一章数学电气工程公共基础注册电气工程师（发输变电）公共基础

答案解析

A

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