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case 1) f = f(x,y,z) where we know that x,y,z are INDEPENDENT

You are currently reading a thread in /sci/ - Science & Math

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368 KB, 1230x573
case 1)
f = f(x,y,z) where we know that x,y,z are INDEPENDENT of each other

- the total derivative:
[math]\frac {df} {dx} = \frac {\partial f} {\partial x} \frac {dx} {dx} + \frac {\partial f} {\partial y} \frac {dy} {dx} + \frac {\partial f} {\partial z} \frac {dz} {dx}[/math]
[math]\frac {df} {dx} = \frac {\partial f} {\partial x} (1) + \frac {\partial f} {\partial y} (0) + \frac {\partial f} {\partial z} (0)[/math]
[math]\frac {df} {dx} = \frac {\partial f} {\partial x}[/math]

- the partial:
[math]\frac {\partial f} {\partial x} = \frac {\partial f} {\partial x}[/math]

case 2)
f = f(x,y,z) where we know that x,y,z are DEPENDENT on x

- the total derivative:
[math]\frac {df} {dx} = \frac {\partial f} {\partial x} \frac {dx} {dx} + \frac {\partial f} {\partial y} \frac {dy} {dx} + \frac {\partial f} {\partial z} \frac {dz} {dx}[/math]
[math]\frac {df} {dx} = \frac {\partial f} {\partial x} (1) + \frac {\partial f} {\partial y} \frac {dy} {dx} + \frac {\partial f} {\partial z} \frac {dz} {dx}[/math]
[math]\frac {df} {dx} = \frac {\partial f} {\partial x} + \frac {\partial f} {\partial y} \frac {dy} {dx} + \frac {\partial f} {\partial z} \frac {dz} {dx}[/math]

- the partial:
[math]\frac {\partial f} {\partial x} = \frac {\partial f} {\partial x} + \frac {\partial f} {\partial y} \frac {\partial y} {\partial x} + \frac {\partial f} {\partial z} \frac {\partial z} {\partial x}[/math]

mfw partials and totals are same and mathfags just like to jerk themselves off with different notations
>>
>mfw sci doesnt reply to anything that doesnt have

.9999999 = 1???
earth is flat faggots
meme musk rockets
le fucking ai doom bots
>>
>>7809153
What the fuck are you doing? The total derivative is as you wrote it. The partial derivative does derivation assuming the other variables constant.

That is \frac{\partial f}{\partial x} = \frac{\partial f}{\partial x} on both occasions.
>>
>>7809337
Apparently I must do something more for latex output to appear.
Thread replies: 4
Thread images: 1

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