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#26 Re: Help Me ! » Integral II » 2007-11-22 13:23:22
From here
The conclusion follows.
#27 Re: Help Me ! » Integral » 2007-11-22 13:19:22
More generally:
Let
So
#28 Re: Help Me ! » Integration by substitution. » 2007-11-22 12:59:06
Question the integal of x over the square root of (x+1) dx
Okay, this makes more sense.
Substitute
#29 Re: Help Me ! » computing integral » 2007-11-22 09:25:46
i'm not sure how to approach this. any help would be greatly appreciated!
integral of e^[-(x-1/2z)^2] dx
Sure. This makes sense if
That means that we're talking about the famous gaussian integral:
This can be proven in many ways. Polar transform is the common one.
#30 Re: Help Me ! » solve » 2007-11-18 10:22:37
Looks like solutions are contained on the interval
Nasty, eh.
Anyway, graph the equation, you'll see.
#31 Re: Exercises » Integral section » 2007-11-15 13:58:38
Okay, here's a solution:
Substitute
The integral becomes to
The conclusion follows.
#32 Re: Help Me ! » particular solution differential equations » 2007-11-13 13:55:08
You have to solve first the linear ODE, do you know what's the Integrating Factor?
#33 Re: Help Me ! » Which chain rule? » 2007-11-07 07:16:16
It means you to apply the Leibniz Rule for differentiation under the integral sign. Do you know what is it?
#34 Re: Help Me ! » integration » 2007-10-23 10:14:54
With some simple calculations yields
I think you can take it from there.
#35 Re: Help Me ! » arctan function » 2007-10-22 12:08:03
All you need to do is apply integration by parts.
#36 Re: Introductions » Cheers from Chile » 2007-10-21 03:07:27
My home town is Santiago, the capital of Chile.
#37 Re: Help Me ! » hi » 2007-10-18 08:39:02
Aha, I think the main post doesn't make sense, could be Spamming.
#38 Re: Maths Is Fun - Suggestions and Comments » About LaTeX » 2007-10-17 11:05:55
I've seen several forums which LaTeX and text are almost aligned.
Well, I hope you may do something if you can ^^
#39 Re: Maths Is Fun - Suggestions and Comments » About subscriptions » 2007-10-17 01:36:42
This appears when you post
But the second option, never it's activated be itself, one must do it by manual.
I was askin' if you could set a function in the profile such each member may activate that option to not clickin' it when we're posting.
#40 Re: Help Me ! » primitive function » 2007-10-16 11:01:41
You should write
so we want to find
which will be our primitive function.
To integrate
for a suitable
set a trig. substitution.
#41 Re: Dark Discussions at Cafe Infinity » Takin' in spanish » 2007-10-16 08:16:07
It's not so bad, but it could be better.
--
Yes, I'm from Chile and spanish is my mother language.
--
So, would you like to take part in a spanish math forum?
#42 Re: Dark Discussions at Cafe Infinity » Takin' in spanish » 2007-10-16 03:33:51
Bien, entonces no creo que haya problemas en que me entiendas ahora ^^
Te gustaría participar en un foro matemático de habla hispana?
#43 Re: Maths Is Fun - Suggestions and Comments » Image suggestion » 2007-10-16 03:04:11
Mmm... I see people are not giving many opinions.
So, can you increase the dimensions?
What about the size?
#44 Re: Introductions » Cheers from Chile » 2007-10-16 03:03:07
You're welcome.
Thanks both of you for the welcome.
#45 Re: Dark Discussions at Cafe Infinity » Takin' in spanish » 2007-10-16 02:59:47
Aha, good.
lightning, it's "me llamo".
--
What about you Jane?, do you know more than "yo"?
#46 Re: Help Me ! » Trig Limit » 2007-10-16 02:57:55
Of course there's nothing wrong, it's more interesting to compute limits without him.
#47 Maths Is Fun - Suggestions and Comments » About subscriptions » 2007-10-15 15:32:04
- Krizalid
- Replies: 5
When you post, below appears the option "Subscribe to this topic".
Is there a way that the Administrator may set a function on the Profile to predetermine this?
#48 Maths Is Fun - Suggestions and Comments » About LaTeX » 2007-10-15 15:27:55
- Krizalid
- Replies: 5
Why this happens?
If
thenCan you see that LaTeX formula is upper than the text?
#49 Dark Discussions at Cafe Infinity » Takin' in spanish » 2007-10-15 15:12:43
- Krizalid
- Replies: 11
Does anybody here speak spanish?
#50 Introductions » Cheers from Chile » 2007-10-15 15:11:19
- Krizalid
- Replies: 6
Hi, my name is Alejandro and I'm from Chile.
It's good to take part on this forum, Math Rules!