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/sci/ - Science & Math

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11058755 No.11058755 [Reply] [Original]

mathies SEETHING

>> No.11058761

Only true provided d is a variable =/= 0

>> No.11058786

>>11058755
>d not upright
no, i'm cool.

>> No.11058799

>>11058755
[math]\frac{d^2y}{dx^2} = \frac{dy}{x^2}[/math]
Since this equals [math]\frac{d}{dx}(\frac{dy}{dx}) = \frac{y}{x^2}[/math]
We have [math]d=1[/math]
QED

>> No.11058800

>>11058786
I knew I made a mistake somewhere. No matter, ignore this post. I will post it again three weeks time and correct the error.
Thank you mathie, today, it is I who shall leave this thread seething.

>> No.11058813

>>11058755
What makes me seethe is the fact you did this in MS Paint

>> No.11058820
File: 35 KB, 700x610, 1542319569771.jpg [View same] [iqdb] [saucenao] [google]
11058820

>>11058755

>> No.11058884

How do mathematicians interpret this different from engineers?

>> No.11058938

>>11058820
This is brilliant.

>> No.11059117

>>11058820
Hahahaha what

>> No.11059131

>>11058820
>it works for other powers/inverse powers too
G-guys...?

>> No.11059222

>>11059131
It gives d/dx (x^2) = x not 2*x though

>> No.11059234

>>11058820
second line had me giggling like an idiot

>> No.11059674

>>11059222
>x^2
>not 2*x
>222
uh...

>> No.11061197

>>11058755
This is retarded. It's literally saying that a/a = b/b = c/c
wtf is so difficult about that?

>> No.11061576

>>11061197
No, it's saying dy = d*y, which isn't the case.

>> No.11061749
File: 153 KB, 1122x1012, Screen Shot 2019-10-15 at 12.32.24 PM.png [View same] [iqdb] [saucenao] [google]
11061749

Brainlet here, this small question has been annoying me. Why, as in pic related can you separate the variable from the fraction if it's in the numerator, but you couldn't do that if it were in that denominator?

In other words, x/6=1/6x, but 1/(6x) =/= 1/6x

What is the rule for when you can separate the variable from the fraction?

>> No.11061764

>>11061749
You can still separate it, you just end up with (1/6)(1/x). You can't just move the x from the denominator to the numerator when you factor out the 1/6.

>> No.11061788

>>11061764
thank you

>> No.11062125
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11062125

>>11058755
>you can lose information by simplifying an equation


woah, amazing stuff.

>> No.11062136

>>11058755
Im a filthy biologist, what does the middleterm mean, what are the crossing lines?

>> No.11062143

>>11062136
each value is multiplied by the derivative (not true btw) so you can just cancel out the d's in the same way you would factor out and cancel "3" from 15/21

>> No.11062199

>>11062143
thanks!