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## #1 2017-03-15 16:01:44

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

### 4 steps of approximation

Hi ;
Can anyone explain me these 4 steps
How
Dy=£y
Dx~~dx
F (x+£x)~~f(x)+dy
Dy=f (x)£x

MZk

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## #2 2017-03-15 16:26:27

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: 4 steps of approximation

Hi;

This is what your post looks like on my browser:

Now what on earth is that saying?

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.

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## #3 2017-03-15 19:27:36

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

### Re: 4 steps of approximation

Haha delta is £ because there is no symbol in my mob

MZk

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## #4 2017-03-15 19:28:11

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: 4 steps of approximation

And the two squiggly lines?

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.

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## #5 2017-03-15 19:28:40

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

### Re: 4 steps of approximation

~~ is approximately equal to

MZk

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## #6 2017-03-15 19:29:42

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

### Re: 4 steps of approximation

Hehe ...,,,, sorry for this how I write symbols

MZk

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## #7 2017-03-15 19:31:38

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: 4 steps of approximation

Are you defining Dy as

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.

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## #8 2017-03-15 19:33:18

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

δ

MZk

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## #9 2017-03-15 19:35:06

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: 4 steps of approximation

What does that symbol mean?

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.

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## #10 2017-03-15 19:35:31

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

### Re: 4 steps of approximation

I don't know how dy=δy

MZk

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## #11 2017-03-15 19:36:33

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Delta is δ

MZk

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## #12 2017-03-15 19:37:34

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

squiggly ???
Sizzling

MZk

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## #13 2017-03-15 19:48:33

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: 4 steps of approximation

You usually see it like this:

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.

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## #14 2017-03-15 23:03:29

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

### Re: 4 steps of approximation

And others? ?? Things

MZk

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## #15 2017-03-16 04:06:16

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: 4 steps of approximation

In numerical analysis you would see lots of relationships between delta x and dx. In fact, we often replace the differential with a finite difference. But the rest of that is still a hopeless bit of jargon to me. For one thing, you need to define  δ.

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.

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## #16 2017-03-16 04:17:33

bob bundy
Registered: 2010-06-20
Posts: 8,322

### Re: 4 steps of approximation

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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## #17 2017-04-04 20:30:40

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

### Re: 4 steps of approximation

bobbym wrote:

For one thing, you need to define  δ.

In our country  δx=delta x

MZk

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## #18 2017-04-04 20:31:40

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Tell???

MZk

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## #19 2017-04-04 20:33:57

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: 4 steps of approximation

Dy and Dx should probably be dy and dx.

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.

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## #20 2017-04-04 21:06:15

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

### Re: 4 steps of approximation

Means Dy and Dx should probably be dy and dx.

MZk

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## #21 2017-04-04 21:11:39

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: 4 steps of approximation

Now did you look at the page bob bundy recommended?

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.

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## #22 2017-04-05 00:49:29

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

### Re: 4 steps of approximation

I know this thing but see steps of approximation

MZk

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## #23 2017-04-05 02:32:26

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: 4 steps of approximation

It might help if you were to say where this came from.

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.

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## #24 2017-04-05 02:45:09

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

### Re: 4 steps of approximation

IN MY pRECIOUS BOOK OF ENGINEERING CHAPTER 3 INTEgration

3.1 ex

MZk

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## #25 2017-04-05 02:51:15

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: 4 steps of approximation

Do you have the title and the author? Of course, you have not copied it correctly. No book, no matter how bad would ever do such a bad job at notation.

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.

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