/sci/ - Science & Math

If:
All the forces/mass/energy balances each other out, then, in short we have
Possibility 1:
(sum of all forces/mass/energy) = 0 value
(universe) = 0 value

If:
They don't balance each other:
Possibility 2:
(sum of all forces/mass/energy) = positive value
(universe) = positive value
Possibility 3:
(sum of all forces/mass/energy) = negative value
(universe) = negative value

It seems that those are the only 3 options available, and one of them is correct.

>>6998688
>(x^2 + 6x -1 ) = y
>into the equation on the left side
I don't follow anymore.

My brain is full of fuck right now.

First of all, where the fuck does "y=" comes from? And why is it that only the denominator equals to y? Besides, we're talking about an empty integral here, there are no y values here! I mean, usually it looks like integral from 0 to 3 and some value is being integrated...
http://i.stack.imgur.com/bRXmz.jpg
for instance here, y values are from pi to 0

>>6998693
>Then you can plug in (x^3+6x-1)=y on bottom
woah, wait wait, hold on there a sec, how come


>Just take the derivative of y=x^3+6x-1
3x^2 + 6
>and divide both sides by 3 and multiply both sides by dx
but why are there both sides now? and how do you know left side must be "dy"?????
in any case, dividing both sides by 3 should give:
1/3 dy = (x^2 + 2)
then multiplying by dx
1/3 dy dx = dx (x^2 + 2)
I fail to see how as a next step I'd
>plug in (x^3+6x-1)=y on bottom
doesn't make sense...