1-Visitor

Question

Variable in Mathcad and Symbollic Differentiation

Hi,

I would like to get the expression of a function after differentiation with respect to a variable.

Somehow Mathcad does not recognize the variable and tells that the variable is undefined.

it leads to make it impossible to find the derivative.

numerically, the calculation is correct.

It is just this symbolic feature that are having problem.

I appreciate any suggestion.

23-Emerald I

The red circle is one problem, but it shouldn't stop you from getting symbolic derivative:

Author

1-Visitor

Thanks!
It works.
I though I should not include n.

25-Diamond I

Either

or

The first is the cleaner version.

In the latter case you will get an error by the numerics because n is not defined, but the symbolic evaluations should work nonetheless.

25-Diamond I

The problem is the inline evaluation (the last equal sign) when you define your functions.

Delete it!

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