Math Is Fun Forum

zegoat

Member

Registered: 2006-08-21

Posts: 7

Integrals

Im actually struggling on 2 other very basic equations, im watching the tutorials on utube on integration but I cant figure this one out because it looks to simple and all examples are very complex:
         5 
Solve ∫  1 dx
         1  x
and solve:

5
∫ dx
1

Identity

Member

Registered: 2007-04-18

Posts: 934

Re: Integrals

With

It's the same as

Using integrals rules:

when

So we get

Another, more graphical way to look at it is you're finding the area under the line

between

and

. This is simply the area of a rectangle of height 1 and width 4, so the area is 4.

Last edited by Identity (2009-12-03 02:00:02)

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Integrals

Hi zegoat;

If you mean for the first one:

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

zegoat

Member

Registered: 2006-08-21

Posts: 7

Re: Integrals

thx guys, that has helped me alot

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Integrals

Hi zegoat;

Glad to help and welcome to the forum.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.