作业帮在mathematica中怎么计算下面的积分,为什么不显示结果呢?NIntegrate[(1/\[Pi] arccos (r/30) - r/(900 \[Pi]) Sqrt[900 - r^2] + 1/\[Pi] arccos ((30 - r)/30) - (30 - r)/(900 \[Pi]) Sqrt[60 r - r^2]) ((Sqrt[90 - r] - r/(2 Sqrt[90 - r]))/(9
来源：学生作业帮助网 编辑：作业帮 时间：2024/10/06 10:10:16
![在mathematica中怎么计算下面的积分,为什么不显示结果呢?NIntegrate[(1/\[Pi] arccos (r/30) - r/(900 \[Pi]) Sqrt[900 - r^2] + 1/\[Pi] arccos ((30 - r)/30) - (30 - r)/(900 \[Pi]) Sqrt[60 r - r^2]) ((Sqrt[90 - r] - r/(2 Sqrt[90 - r]))/(9](/uploads/image/z/8628091-43-1.jpg?t=%E5%9C%A8mathematica%E4%B8%AD%E6%80%8E%E4%B9%88%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A2%E7%9A%84%E7%A7%AF%E5%88%86%2C%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E6%98%BE%E7%A4%BA%E7%BB%93%E6%9E%9C%E5%91%A2%3FNIntegrate%5B%281%2F%5C%5BPi%5D+arccos+%28r%2F30%29+-+r%2F%28900+%5C%5BPi%5D%29+Sqrt%5B900+-+r%5E2%5D+%2B+1%2F%5C%5BPi%5D+arccos+%28%2830+-+r%29%2F30%29+-+%2830+-+r%29%2F%28900+%5C%5BPi%5D%29+Sqrt%5B60+r+-+r%5E2%5D%29+%28%28Sqrt%5B90+-+r%5D+-+r%2F%282+Sqrt%5B90+-+r%5D%29%29%2F%289)
在mathematica中怎么计算下面的积分,为什么不显示结果呢?NIntegrate[(1/\[Pi] arccos (r/30) - r/(900 \[Pi]) Sqrt[900 - r^2] + 1/\[Pi] arccos ((30 - r)/30) - (30 - r)/(900 \[Pi]) Sqrt[60 r - r^2]) ((Sqrt[90 - r] - r/(2 Sqrt[90 - r]))/(9
在mathematica中怎么计算下面的积分,为什么不显示结果呢?
NIntegrate[(1/\[Pi] arccos (r/30) - r/(900 \[Pi]) Sqrt[900 - r^2] +
1/\[Pi] arccos ((30 - r)/30) - (30 - r)/(900 \[Pi]) Sqrt[
60 r - r^2]) ((Sqrt[90 - r] - r/(2 Sqrt[90 - r]))/(900 \[Pi]) -
1/(30 \[Pi] Sqrt[1 - (r/30)^2])),{r,0,30}]
在mathematica中怎么计算下面的积分,为什么不显示结果呢?NIntegrate[(1/\[Pi] arccos (r/30) - r/(900 \[Pi]) Sqrt[900 - r^2] + 1/\[Pi] arccos ((30 - r)/30) - (30 - r)/(900 \[Pi]) Sqrt[60 r - r^2]) ((Sqrt[90 - r] - r/(2 Sqrt[90 - r]))/(9
语法错了……：
In[7]:= NIntegrate[(1/\[Pi] ArcCos [r/30] -
r/(900 \[Pi]) Sqrt[900 - r^2] +
1/\[Pi] ArcCos@ ((30 - r)/30) - (30 - r)/(900 \[Pi]) Sqrt[
60 r - r^2]) ((Sqrt[90 - r] - r/(2 Sqrt[90 - r]))/(900 \[Pi]) -
1/(30 \[Pi] Sqrt[1 - (r/30)^2])), {r, 0, 30}]
Out[7]= -0.183888
另外希望看看这里：