Calculate X when derivative is zero

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Gavin Seddon 2016-5-23

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https://ww2.mathworks.cn/matlabcentral/answers/285450-calculate-x-when-derivative-is-zero

关闭： John D'Errico 2016-5-23

Hello, I want to calculate the first X instance when the function derivative is set equal to 0. I understand the solve toolbox will do this but the method is unclear. Will someone describe this procedure?

Gavin.

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John D'Errico 2016-5-23

Read the help for solve. Not that there is NO assurance that solve will yield ALL solutions. As well, solve will often find complex solutions. How you define "first" when a variable is complex is difficult to do.

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