How to solve differential equation

Question

BobbyJoe 2021-1-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/712878-how-to-solve-differential-equation

回答： Walter Roberson 2021-1-9

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

Hi,

I have the following line of code:

clear all;
clc;
answer = dsolve('Da=-k1*a*(b^1.7)','Db=-k1*a*(b^1.7)', 'Dc=k1*a*(b^1.7)','a(0)=0.752','b(0)=1.278','c(0)=0');
answer.a

But when I run it, it returns with the following:

Warning: Unable to find explicit solution. 
> In dsolve (line 201)
  In API2_OldMethod (line 6) 
Dot indexing is not supported for variables of this type.
Error in sym/subsref (line 890)
            R_tilde = builtin('subsref',L_tilde,Idx);
Error in API2_OldMethod (line 7)
answer.a