3 variable derivates

[pseudo cedar]

@signal belfry does subscript u imply u is constant

[signal belfry]

I'm not too sure, it does not say in the lectures or on the tutorial sheet.

[pseudo cedar]

Have you learnt partial derivatives

[signal belfry]

yes

i can do 2 variable ones just not three variables for some reason

and not sure how to deal with the trig and log functions :(

[pseudo cedar]

You have atleast 3 in a partial

Normally, for partial wrt u, treat v as constant

It is very similar to a question with two variables

[signal belfry]

I did attempt it just didn’t get anywhere

[pseudo cedar]

Where did you get stuck

[signal belfry]

never mind i'm geeking

I got there in the end thank you.

i will definitely need help with double integration later though 😭

[signal belfry]

.solved