If you have the software installed, follow these steps to activate it:
: If you already own R2009b, you can find your license number by typing license in the MATLAB command prompt. If the software isn't installed, your License Administrator can retrieve the key from the MathWorks License Center. Matlab R2009b Activation Key
To activate , you must use the official MathWorks Activation Client provided with your installation. Released in September 2009, this version (internal version 7.9) introduced features like customizable keyboard shortcuts and the ~ notation for ignored arguments. How to Get Your Activation Key If you have the software installed, follow these
Activate MATLAB Installation Manually - MATLAB & Simulink - MathWorks If you have the software installed