- #1

- 2,440

- 316

- Homework Statement
- see attached

- Relevant Equations
- total derivatives

see attached below; the textbook i have has many errors...

clearly ##f_x## is wrong messing up the whole working to solution...we ought to have;

##\frac {du}{dx}=(9x^2+2y)+(2x+8y)3=9x^2+2y+6x+24y=9x^2+6x+26y##

clearly ##f_x## is wrong messing up the whole working to solution...we ought to have;

##\frac {du}{dx}=(9x^2+2y)+(2x+8y)3=9x^2+2y+6x+24y=9x^2+6x+26y##

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