物理选择题~!求大家帮忙解决~!2.The coordinate of a particle in meters is given by x(t)=16t-3.0t^3, where the time t is in seconds. The particle is momentarily at rest at t=a)0.75sb)1.3sc)5.3sd)7.3sb)9.3s是问停留的时间?大家帮忙

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物理选择题~!求大家帮忙解决~!2.The coordinate of a particle in meters is given by x(t)=16t-3.0t^3, where the time t is in seconds. The particle is momentarily at rest at t=a)0.75sb)1.3sc)5.3sd)7.3sb)9.3s是问停留的时间?大家帮忙
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物理选择题~!求大家帮忙解决~!2.The coordinate of a particle in meters is given by x(t)=16t-3.0t^3, where the time t is in seconds. The particle is momentarily at rest at t=a)0.75sb)1.3sc)5.3sd)7.3sb)9.3s是问停留的时间?大家帮忙
物理选择题~!求大家帮忙解决~!
2.The coordinate of a particle in meters is given by x(t)=16t-3.0t^3, where the time t is in seconds. The particle is momentarily at rest at t=
a)0.75s
b)1.3s
c)5.3s
d)7.3s
b)9.3s
是问停留的时间?大家帮忙解决啊~呜呜~

物理选择题~!求大家帮忙解决~!2.The coordinate of a particle in meters is given by x(t)=16t-3.0t^3, where the time t is in seconds. The particle is momentarily at rest at t=a)0.75sb)1.3sc)5.3sd)7.3sb)9.3s是问停留的时间?大家帮忙
好象是函数题x(t)=16t-3.0t^3 解x=
英文我是看不懂的
我猜是求最值或0点一类的把

物理选择题~!求大家帮忙解决~!2.The coordinate of a particle in meters is given by x(t)=16t-3.0t^3, where the time t is in seconds. The particle is momentarily at rest at t=a)0.75sb)1.3sc)5.3sd)7.3sb)9.3s是问停留的时间?大家帮忙 帮忙解决一下化学选择题 数学题大家帮忙解决 急,麻烦大家帮忙解决一下这里到数学的选择题,谢谢 大家帮忙解决一道题~~ 物理选择题求解释 物理选择题,求正确答案 物理选择题求检查! 求数学帮忙选择题帮忙 高中选择题求帮忙 选择题大神求帮忙 历史选择题 求帮忙 求数学帮忙选择题 求物理电学难题大家有好题的帮忙推荐些 物理物理～～～初三求解决 物理求大神解决. 求高人帮忙解答2008年全国卷1第一个物理选择题 求过程、 关于中秋节的选择题,大家帮忙啊