has fsolve been replaced in MATLAB 2010a?

I just upgraded to MATLAB 开发者_如何学编程2010a. It seems that fsolve no longer works. Has this been replaced?

The function FSOLVE is a part of the Optimization Toolbox. Do you still have access to this toolbox with your new MATLAB version? Here are some things you can try to find out:

• Can you use any of the other functions in the toolbox?
• What does the output of the function VER show you? Does the Optimization Toolbox show up?

• Use the function LICENSE and see if either of these returns 1:

  license('test','Optimization_Toolbox')      %# See if a license exists
  license('checkout','Optimization_Toolbox')  %# Try to check a license out