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

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 388

### 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

Math !!!!.

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

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,752

### 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: 388

### Re: 4 steps of approximation

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

Math !!!!.

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

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,752

### 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: 388

### Re: 4 steps of approximation

~~ is approximately equal to

Math !!!!.

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

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 388

### Re: 4 steps of approximation

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

Math !!!!.

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

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,752

### 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: 388

δ

Math !!!!.

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

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,752

### 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: 388

### Re: 4 steps of approximation

I don't know how dy=δy

Math !!!!.

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

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 388

Delta is δ

Math !!!!.

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

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 388

squiggly ???
Sizzling

Math !!!!.

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

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,752

### 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: 388

### Re: 4 steps of approximation

And others? ?? Things

Math !!!!.

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

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,752

### 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
Moderator
Registered: 2010-06-20
Posts: 7,846

### 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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