What's difference between these?(derivation)

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SUMMARY

The discussion clarifies the differences between various types of derivatives in calculus. Specifically, it distinguishes between single-variable derivatives, such as G' which represents the rate of change of function G, and multi-variable derivatives, including Hx (∂H/∂x) and Hxy (∂²H/∂x∂y). The participants provide definitions and notations for these derivatives, emphasizing their applications in understanding how functions change with respect to their variables.

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Hamid1
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Hi all.
I know concept of derivation but I don't know the differences between these:
http://hamid693.persiangig.com/qu.jpg
can anyone explain what's difference between these?(1 to 5)

Thanks(and excuse me for my probable English mistakes
 
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Hi Hamid1! :smile:

(1) I've no idea what that is :redface:

(2) H is a function one variable only, G, and dH/dG is the rate of change

(3) H is a function of variables including x, and Hx is the rate of change of H if x is changed, but the other variables are constant; Hx is also written ∂H/∂x

(4) H is a function of variables including x and y, and Hxy = (Hx)y = (Hy)x = ∂2H/∂x∂y

(5) G is a function of one variable only, and G' is the rate of change
 

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