Mister Exam

Derivative of factorial(x)

Function f() - derivative -N order at the point
v

The graph:

from to

Piecewise:

The solution

You have entered [src]
x!
$$x!$$
factorial(x)
The first derivative [src]
Gamma(1 + x)*polygamma(0, 1 + x)
$$\Gamma\left(x + 1\right) \operatorname{polygamma}{\left(0,x + 1 \right)}$$
The second derivative [src]
/         2                                \             
\polygamma (0, 1 + x) + polygamma(1, 1 + x)/*Gamma(1 + x)
$$\left(\operatorname{polygamma}^{2}{\left(0,x + 1 \right)} + \operatorname{polygamma}{\left(1,x + 1 \right)}\right) \Gamma\left(x + 1\right)$$
The third derivative [src]
/         3                                                                            \             
\polygamma (0, 1 + x) + 3*polygamma(0, 1 + x)*polygamma(1, 1 + x) + polygamma(2, 1 + x)/*Gamma(1 + x)
$$\left(\operatorname{polygamma}^{3}{\left(0,x + 1 \right)} + 3 \operatorname{polygamma}{\left(0,x + 1 \right)} \operatorname{polygamma}{\left(1,x + 1 \right)} + \operatorname{polygamma}{\left(2,x + 1 \right)}\right) \Gamma\left(x + 1\right)$$