清空筛选条件
清空筛选条件

Wanna find x that maximize a function including symbolic variables

14 次查看（过去 30 天）
嵩人 藤森
嵩人 藤森 2021-5-20
评论： 嵩人 藤森 2021-5-22
Hello,
I wanna find x that maximize the following unction including symbolic variables. Please teach me how to do so.
K,m,T,D >0
-------------------------------------------------------------------------
syms K,m,T,D,x
f(x)=sqrt(1/( (K-(m+T*D)*x^2)^2 + x^2*(D+T*K-T*m*x^2)^2))
------------------------------------------------------------------------------
Best regards
  2 个评论
Torsten
Torsten 2021-5-20
编辑：Torsten 2021-5-20
Set the denominator to zero and use Matlab's "solve" to solve for x^2.
If you don't get x real-valued, differentiate the denominator with respect to x, set the derivative to zero and again use Matlab's "solve" to solve for x.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

KSSV
KSSV 2021-5-20
Ran in:
syms K m T D x
f(x)=sqrt(1/( (K-(m+T*D)*x^2)^2 + x^2*(D+T*K-T*m*x^2)^2)) ;
df = diff(f,x)
df(x) = 
s = solve(df,x)
Warning: Solutions are only valid under certain conditions. To include parameters and conditions in the solution, specify the 'ReturnConditions' value as 'true'.
s = 

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Calculus 的更多信息

标签

产品


版本

R2020b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by