Derivative of a partial Deriative

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SUMMARY

The discussion focuses on differentiating a partial derivative, specifically the expression d/dt (∂U/∂X). It is clarified that if U is a function of both x and t, then ∂U/∂X will also depend on t, making d/dt(∂U/∂X) a partial derivative. An example is provided where U(x,t) = 4x²t³, leading to ∂U/∂X = 8xt³ and d/dt(∂U/∂X) = 24xt², demonstrating the differentiation process clearly.

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yinx
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Hi guys,
how do a differentiation on a partial derivative e.g: d/dt (partial U / Partial X) ?

kinda confused about it. Would be great if someone can answer this qn thanks!
 
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yinx said:
Hi guys,
how do a differentiation on a partial derivative e.g: d/dt (partial U / Partial X) ?

kinda confused about it. Would be great if someone can answer this qn thanks!

Hey Yinx. I'll be using d as the partial d for ease of typing.
Firstly, there may be an error. If U is a function of both x and t, then (except in the obvious case) dU/dx will also be a function of both x and t, and d/dt(dU/dx) will thus also be a partial derivative.

That aside, simply differentiate with respect to t.

Example:

U(x,t)=4x^2t^3

dU/dx=8xt^3

d/dt(dU/dx)=24xt^2

Did that make sense, or were you looking for something else?
 

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