作业帮隐函数求导怎么弄?用mathematica……
来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/05/07 10:45:19
隐函数求导怎么弄?用mathematica……
给个我自己的例子给你,其中ri 即为隐函数,变量为t.多看看帮助文档吧,少年.
NDSolve[{
\!\(\*SuperscriptBox["\[Theta]i","\[Prime]",
MultilineFunction->None]\)[t] == dir* p\[Theta][ri[t],\[Theta]i[t]],
\!\(\*SuperscriptBox["ri","\[Prime]",
MultilineFunction->None]\)[t] ==
dir* ri[t] pr[ri[t],\[Theta]i[t]],\[Theta]i[0] == \[Theta]0,
ri[0] == r0},{\[Theta]i,ri},{t,0,tend},
MaxSteps -> 2000]
NDSolve[{
\!\(\*SuperscriptBox["\[Theta]i","\[Prime]",
MultilineFunction->None]\)[t] == dir* p\[Theta][ri[t],\[Theta]i[t]],
\!\(\*SuperscriptBox["ri","\[Prime]",
MultilineFunction->None]\)[t] ==
dir* ri[t] pr[ri[t],\[Theta]i[t]],\[Theta]i[0] == \[Theta]0,
ri[0] == r0},{\[Theta]i,ri},{t,0,tend},
MaxSteps -> 2000]