Solving the equation via matlab

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Abdulmajid Mrebit 2015-8-9

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https://ww2.mathworks.cn/matlabcentral/answers/233001-solving-the-equation-via-matlab

评论： Walter Roberson 2015-8-9

Hi Everybody

I am trying to solve the equation in picture below but I face many problems, Is there anyone can help me.

Thanks in advance

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John D'Errico 2015-8-9

编辑：John D'Errico 2015-8-9

OK, so you have done nothing, tried nothing, and expect a solution for your homework problem. You SAY that you have faced many problems, but we see no hint.

I'll give you a suggestion. Pick values of d and L. (Use nested loops on d and L, but there are other ways.) Then solve.

Walter Roberson 2015-8-9

If you let x have a vector value, then 1-exp(a*x) has a vector result. When you have a vector expression, you can use prod() to multiply all of the members of the vector together. Now you can construct an anonymous function f = @(R) 1 - prod(....) that given a particular R value calculates the right hand side of your expression. After that it is a matter of finding a numeric solution:

http://www.mathworks.com/matlabcentral/answers/103169-how-do-i-find-all-the-zeros-of-a-function

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