## simanliu 3 years ago Please show proof of Chain Rule

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1. Silent_Sorrow

This is the proof that I was shown when I learnt the chain rule http://math.rice.edu/~cjd/chainrule.pdf

2. simanliu

thank you so much, i will be sure to check it out!

3. Topi

What is there to prove. If u is differentiable function of x and x is differentiable function of t then u is diffrentiable function of t and $\frac{ du }{ dt } = \frac{ du }{ dt }\frac{ dx }{ dx } = \frac{ du }{ dx }\frac{ dx }{ dt }$ because $\frac{ dx }{ dx }=1$