Hi everyone,

I have been working on the partial differentiation, but I have not been succesfull so far. Therefore I hoped someone here could help me solve it.

The variance:

What is the best way of partially differentiating w.r.t. this thing? I tried maple, but it gives an answer with which I can't work.

I tried to copy paste it here, but that didn't work, nor did uploading as a picture..

I hope someone has some good advice.

Regards,

Dirk