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you integrate

@modphysnoob haha thats no help

Use To Integrate

this is approximation

I will draw a picture and explain this

|dw:1364087469983:dw|
this is left hand approximation

|dw:1364087569386:dw|
this is right hand approximation

see the difference?

One is above the curve, and one is below it, to put it simply. :)

Err, left approximation, not right in that first sentence.

yes, right, so as you said, in left hand over approximate, right hand under approximate

right,

so from 2 to 5
5- 2
-------------------
6
3/6
1/2

so each rectangle is 1/2 wide

Yeah, I was getting there! So, I understand that part. :)

|dw:1364088406811:dw|

yes

sigma just mean sum
|dw:1364090915002:dw|

Yes, I know that much. It's just figuring out the pattern is where I have trouble.

I mean, I know that's going to be all the areas of rectangles added together.

yep, that's all there is to it

I assume you are in calculus 2

Calculus I.

if you want I can do example for you

@modphysnoob - I know this a late reply, but by all means go for it, if you don't mind. :)

so let's do a parabola
f(x)= x^2
|dw:1364157776078:dw|

|dw:1364157838998:dw|

Okay.

Okay, I follow you so far. :) Sorry for the delay in answering; internet problems.

well, there you have it , left and right approximation

you will learn trapizoid approximation which is average between left and right hand