Hello,

I have here a strength differential

Normally is not a big problem but I making a mistake I don't know:

let my try thus

thus

And thus

Now I need to multiply al the thinks and then I find but it's not correct.

Where do I miss ? Greets.

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- May 9th 2006, 04:56 AMBertDifferential
Hello,

I have here a strength differential

Normally is not a big problem but I making a mistake I don't know:

let my try thus

thus

And thus

Now I need to multiply al the thinks and then I find but it's not correct.

Where do I miss ? Greets. - May 9th 2006, 05:33 AMCaptainBlackQuote:

Originally Posted by**Bert**

Stage 2 - Chain rule on last term on the right:

From here you should be able to simplify this yourself.

RonL - May 10th 2006, 01:47 AMBert
thus you can splits this in two parts by the produc rule

then you have

I can find then on this way: Thus

Then and

Then

But why is this fault ?

And then multiply them what is mis? Greets. - May 10th 2006, 03:16 PMThePerfectHackerQuote:

Originally Posted by**Bert**

then,

You confused with anti-derivative. - May 11th 2006, 01:06 AMBert
of cours thank you very well.

a small problem If I simplify

then I get And this it not the same as I differentiate the original by my computer program then I get - May 11th 2006, 07:55 AMearbothQuote:

Originally Posted by**Bert**

Hello,

Then and

If you use the chain rule on v' then you get:

Greetings

EB - May 11th 2006, 08:16 AMBert
Thank you very well I find them great good forum :) Greets Thanks