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I'm working with some derivatives which I am having a lot of trouble with.

Here are the 2 forms I'm stuck on:

(1) d/dx (x')^2 , where x is a function of t and x' is the first derivative of x with respect to t.

(2) d/dx' (x) , same conditions as above, never seen one of these before.

Can anyone help me with the general solutions to these problems?

I think the answer to the first one is 2x'' where x'' is the second derivative of x with respect to t, but I'm really not sure and I have no idea with the second one.

Thanks for any help provided.

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# D/dx' (x) ? WTF

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