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ChadG.1-Visitor
1-Visitor
April 20, 2011
Solved

Simple-Symbolic Derivative

  • April 20, 2011
  • 3 replies
  • 5776 views

How can I get a simple derivative like partially defferentiating F(n,a*x) with respect to x to display aF'(n,a*x)

instead of calculating into two branches....

in other words how can I tell mathcad in a complicated derivations to just display the derivative (substitute it)

Same question (differently)

How can I tell Mathcad when using symbolic calcualtions instead of evaluating Bessel and Hankel functions to just show a derivative of the function:

For example let's say I'm differentiating Jn(n,K*r) with respect to r the derivative should display Jn'(n,K*r)*K or :\frac{\part Jn}{\part r}(n,K*r) =K*frac{\part Jn}{\part r}(n,K*r).

I do not know how Can you include mathcad in here

Best answer by RichardJ

Sorry but I have not figured how to embed a sheet within my post.

Neither have I. Those were just bitmaps cut down from a screen capture

This is the only thing I can think of doing. To get the full expressions you would have to substitute all the derivatives of the Bessel and Hankel functions (which are not what you showed!) by hand. Painful, but it would get you there.

3 replies

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MikeArmstrong1-Visitor
1-Visitor
April 20, 2011

You can include a worksheet with your post by using the insert link denoted by a blue capital A.

Including a worksheet with or posts always helps.

Mike

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ChadG.1-VisitorAuthor
1-Visitor
April 20, 2011

I clicked on the blue A it needs a website! it did not let me include math. file instead. How can I just copy paste from Mathcad inside my text.

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RichardJ19-Tanzanite
19-Tanzanite
April 20, 2011

How can I just copy paste from Mathcad inside my text.

You can't. I wish it were possible, but it's not. The only thing you can do is a screen capture, crop the bitmap if necessary, then insert that by clicking on the camera icon.

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RichardJ19-Tanzanite
19-Tanzanite
April 20, 2011

How can I get a simple derivative like partially defferentiating F(n,a*x) with respect to x to display aF'(n,a*x)

What is F' supposed to represent?

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RichardJ19-Tanzanite
19-Tanzanite
April 20, 2011
For example let's say I'm differentiating Jn(n,K*r) with respect to r the derivative should display Jn'(n,K*r)*K or :\frac{\part Jn}{\part r}(n,K*r) =K*frac{\part Jn}{\part r}(n,K*r).

Forget that last question. I have figured out what your interesting notation represents. If I am correct, you want the symbolic processor to take this

der1.gif

and display this as the result:

der2.gif

There is no way to make the symbolic processor display that result, because it's not correct.

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ChadG.1-VisitorAuthor
1-Visitor
April 20, 2011

For example I wish to use the symbolic processor to symbolically give me the outcome of sigma's per the attached sheet. Since the result is too long to display I am thinking if the processor can just simplify to an understandable without calculating the details.

simple example:

or

and

yeilds

Sorry but I have not figured how to embed a sheet within my post.

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RichardJ19-TanzaniteAnswer
19-Tanzanite
April 20, 2011

Sorry but I have not figured how to embed a sheet within my post.

Neither have I. Those were just bitmaps cut down from a screen capture

This is the only thing I can think of doing. To get the full expressions you would have to substitute all the derivatives of the Bessel and Hankel functions (which are not what you showed!) by hand. Painful, but it would get you there.

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