Jump to content

Integral question.


Thorham

Recommended Posts

t looks to be a real number. dt is a formal symbol that tells you what you are integrating with respect to. For simple integrals like that there is no more in it really. You can use Riemann's definition.

Link to comment
Share on other sites

In this integral (error function), what is d and what is t?

 

3443265ce8cb884d9c894401ab15fa71.png

 

This stuff is hard to find for math noobs :D

What do you mean what is d and what is t? That is part of integral notation.

 

EDIT: I thumbed up the wrong post. I meant just to thumb up ajb. Oops? ^_^

Edited by Unity+
Link to comment
Share on other sites

t looks to be a real number. dt is a formal symbol that tells you what you are integrating with respect to. For simple integrals like that there is no more in it really. You can use Riemann's definition.

 

I have no Idea what that means.

 

Could someone explain this as if I'm a four year old?

Edited by Thorham
Link to comment
Share on other sites

 

I have no Idea what that means.

 

Could someone explain this as if I'm a four year old?

It means that you are taking the reverse derivative of an equation with respect to a particular variable.

 

For example, let's say you have ax+b and the point is to integrat this equation with respect to x, or apply the integral to that particular variable.

 

You would treat every other variable like a constant and simply integrate x.

 

ax^2/2 + bx

Edited by Unity+
Link to comment
Share on other sites

It means that you are taking the reverse derivative of an equation with respect to a particular variable.

 

For example, let's say you have ax+b and the point is to integrat this equation with respect to x, or apply the integral to that particular variable.

 

You would treat every other variable like a constant and simply integrate x.

 

ax^2/2 + bx

 

I don't understand that, either. The gaps in my maths knowledge are just to large. Perhaps it's time to go and do something about that.

Link to comment
Share on other sites

What about it do you not understand?

 

Everything. I took a quick look at integrals and thought it wasn't so hard, but I don't get any of it. I should probably just take my time to learn integrals properly.

Link to comment
Share on other sites

 

Everything. I took a quick look at integrals and thought it wasn't so hard, but I don't get any of it. I should probably just take my time to learn integrals properly.

Good idea!!!!! You need to understand the basic notation.

Link to comment
Share on other sites

 

Everything. I took a quick look at integrals and thought it wasn't so hard, but I don't get any of it. I should probably just take my time to learn integrals properly.

Before learning integrals, I think you should start with derivatives first. If that is confusing, I would start with limits of functions then.

Link to comment
Share on other sites

 

Everything. I took a quick look at integrals and thought it wasn't so hard, but I don't get any of it. I should probably just take my time to learn integrals properly.

 

The integral is just the opposite of the derivative so the tutorials on this forum should give you a helping hand.

 

http://www.scienceforums.net/topic/29473-introduction-to-calculus-differentiation/

http://www.scienceforums.net/topic/4108-calculus-i-lesson-1-a-background-to-differentation/

http://www.scienceforums.net/topic/4182-calculus-i-lesson-2-a-continuation-from-first-principles/

Link to comment
Share on other sites

Or you you can think in terms of the area under the graph. If you ploy y = f(x) then the integral over x1 to x2 is the area under the graph between these two points.

Link to comment
Share on other sites

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.