math for Reps xD

Here's the answer, thanks to Shia, rep her, not me.

L(y',y,x) = 1/2 (2 e^(13 x/8 ) (3/8 e^(x^2) x^2-e^x/2) y+e^(13 x/8 ) y^,^2+1/8 e^(13 x/8 ) y^2)

8 y''[x] + 13 y'[x] - y = 3 x^2 e^x^2 - 4 e^x - 3.

In Lagrange form.

L(y',y,x) = 1/2 (2 e^(1.625 x) y (0.375 e^(x^2) x^2-0.5 e^x+0 y'+0 y-0.375)+e^(1.625 x) y^,^2+0.125 e^(1.625 x) y^2)

Your numbers are BS. It's not pretty...

y(x) = 0.093384 e^(0.0735904 x) erfi(0.0367952-x)+c_1 e^(-1.69859 x)+c_2 e^(0.0735904 x)-0.0455807 e^(-1.69859 x) erfi(-x-0.849295)-0.0657549 e^(-1.69859 x) erfi(x+0.849295)+0 e^(x (x+1.69859)-1.69859 x) x+3. e^(0 x)-0.2 e^(1. x)+0.09375 e^(x (x+1.69859)-1.69859 x)

I prettified it.


Because your numbers are BS, there's an imaginary error function in there. =A=

Lol, that's because it's just a random function I came up with...

Anyway, IOU rep.

Seriously.

It's maths, sir.

That's not what I'm refering to, smart one. This entire garbage topic makes me go:

Lol, and here I'm amazed to see someone actually thought of maths as garbage topic...

The idea of gaining rep for something as silly as solving hypothetical math problems is even more amazing.

Amazing because there are some who can't solve them? Indeed.

I lol'd so many times while reading all of this

69

Amazing how you're missing my point.

Well, whatever. All I know is that I'm gonna rep someone who helped me...that's all. ^_^

does effort count?? lol

Srry for the LAAATE post but thats the answer in math book *just think this is what they are teaching

Z-Transform of this shit:



Hint: http://en.wikipedia.org/wiki/Z-transform

It is the easiest one. If you can't answer, then..


Have Fun.

Then explain. Why is this thread unworthy of your approval stamp, your highness...?

Jump over to my other thread, my loyal peon, which I see you already did.

I think this is worthy if they answer a question like the one i asked.
It is really deserve +rep if they can answer my easiest question. Not their simply- flip-your-hand question.

2(5x-6y)+3y-22. Simple enough problem.


Oh yeah, and 5/0. Solve that one.