May 2021 1 51 Report
Partial derivatives and multi-variable differentiation problem?

I added an image of the problem. I'm trying to figure out the first part (all of it really). My first thought was to solve s=(r-1)e^r to r and then derive dr/ds and it's partially working. I'm under the impression my answer for that is going to have to like (e^-r)/r since that's what w is equal to but? I feel like I'm going in the right direction but I'm stuck now. Any help would be great, thank you!

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