The numerical value of the derivative in Mathcad can be obtained by input of the definite numerical value of the differentiation variable with the consequent performing of the operation of character differentiation and computing of the value of the derivative in the indicated point. The other method in Mathcad offers the initial defining of the user function as the derivative of the given function, with the consequent computing of the numerical value of the user function with the given value of the numerical argument. While performing calculations it is obligatory to remember that it is not allowed to input the numerical value of the differentiation variable into the expression directly, for if this occurs the differentiable function turns into a constant and its derivative will be zero. The examples of determination of the numerical value of the derivative in Mathcad are shown in the programme listing.
Determination of the numerical value of the derivative
Computing via character differentiation method