Math Is Fun Forum

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

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

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Malik

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?

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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.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

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

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Malik

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 4 steps of approximation

And the two squiggly lines?

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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.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

~~ is approximately equal to

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Malik

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

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

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Malik

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.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

δ

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Malik

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.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

I don't know how dy=δy

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Malik

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

Delta is δ

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Malik

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

squiggly ???
Sizzling

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Malik

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 4 steps of approximation

You usually see it like this:

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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.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

And others? ?? Things

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Malik

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.

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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.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,640

Re: 4 steps of approximation

Have you looked at this page?

http://www.mathsisfun.com/calculus/deri … dy-dx.html

Bob

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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
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

For one thing, you need to define  δ.

In our country  δx=delta x

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Malik

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

Tell???

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Malik

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.

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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.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

Means Dy and Dx should probably be dy and dx.

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Malik

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?

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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.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

I know this thing but see steps of approximation

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Malik

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.

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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.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: 4 steps of approximation

IN MY pRECIOUS BOOK OF ENGINEERING CHAPTER 3 INTEgration

3.1 ex

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Malik

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.

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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.