Question about gradient and Hessian
http://workspace.imperial.ac.uk/mathematics/public/students/ug/exampapers/2010/M2AA3-2010.PDF
http://workspace.imperial.ac.uk/mathematics/public/students/ug/exampapers/2010/M2AA3-2010.PDF
Page 2. Is there a trick to finding grad and D^2 of f here, or do we have to to write it out as a big summation and work it out? The latter method seems like it would take too long in an exam situation.
http://workspace.imperial.ac.uk/mathematics/public/students/ug/exampapers/2010/M2AA3-2010.PDF
Page 2. Is there a trick to finding grad and D^2 of f here, or do we have to to write it out as a big summation and work it out? The latter method seems like it would take too long in an exam situation.
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