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The derivative of the function/ factorial(x)

Derivative of factorial(x)

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

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The solution

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