Partial derivative

Nov 2019
1
0
Germany
Screenshot 2019-11-02 at 01.47.45.png

Hi, I have a problem, the first part is solved using cyclic rule, but the second part makes me confused. Anybody can help?
 
Oct 2019
9
4
India
First you have to learn what are independent and dependent variables by illustrations of partial derivatives of multivariable functions. Like,
For example:
Problem:
F(x,y,z) = xy²z⁴ , where z = 2x+ 3y
find (δF/δx)𝓏

My working is in the attachments below.
 

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