I want to know haw to activate matlab R2009b license?

solution for activating license matlab R2009b

Answer 1

[Walter Roberson]

If you have an existing license for R2009b or later, then contact Mathworks support to get the activation key.

If you do not have an existing license for R2009b or later, then you will need to purchase a current license, after which you will be able to use that version or older. (Note: we are not certain whether this applies to Student licenses.)