Mathematics, 16.07.2021 05:50 juli8350
已知一个质点做变速直线运动的位移函数 s 3t 2 e2t , t为时 间,则在时刻t 2处的速度和加速度分别为
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已知一个质点做变速直线运动的位移函数 s 3t 2 e2t , t为时 间,则在时刻t 2处的速度和加速度分别为...
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