in my exam prep I have the following:
I need to calculate the gradient of this function f. So I start using the chain rule but how do I get the derivative of <x,wi>?
Why does the x of the derivative disappear? I tried to use: <a,b> = a'b+b'a.
But wouldn't this give me x+w? Is this formular wrong to use in this context?
The solution only states this but not how to get there:
Thanks in advance!