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acot(x^2/a+pi*k)

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Derivative of acot(x^2/a+pi*k)

Function f() - derivative -N order at the point
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The solution

You have entered [src]
    / 2       \
    |x        |
acot|-- + pi*k|
    \a        /
$$\operatorname{acot}{\left(\pi k + \frac{x^{2}}{a} \right)}$$
  /    / 2       \\
d |    |x        ||
--|acot|-- + pi*k||
dx\    \a        //
$$\frac{\partial}{\partial x} \operatorname{acot}{\left(\pi k + \frac{x^{2}}{a} \right)}$$
The first derivative [src]
        -2*x        
--------------------
  /               2\
  |    / 2       \ |
  |    |x        | |
a*|1 + |-- + pi*k| |
  \    \a        / /
$$- \frac{2 x}{a \left(\left(\pi k + \frac{x^{2}}{a}\right)^{2} + 1\right)}$$
The second derivative [src]
  /            /        2\  \
  |          2 |       x |  |
  |       4*x *|pi*k + --|  |
  |            \       a /  |
2*|-1 + --------------------|
  |       /               2\|
  |       |    /        2\ ||
  |       |    |       x | ||
  |     a*|1 + |pi*k + --| ||
  \       \    \       a / //
-----------------------------
       /               2\    
       |    /        2\ |    
       |    |       x | |    
     a*|1 + |pi*k + --| |    
       \    \       a / /    
$$\frac{2 \left(\frac{4 x^{2} \left(\pi k + \frac{x^{2}}{a}\right)}{a \left(\left(\pi k + \frac{x^{2}}{a}\right)^{2} + 1\right)} - 1\right)}{a \left(\left(\pi k + \frac{x^{2}}{a}\right)^{2} + 1\right)}$$
The third derivative [src]
    /                                 2  \
    |                      /        2\   |
    |                    2 |       x |   |
    |            2    8*x *|pi*k + --|   |
    |         5*x          \       a /   |
8*x*|3*pi*k + ---- - --------------------|
    |          a       /               2\|
    |                  |    /        2\ ||
    |                  |    |       x | ||
    |                a*|1 + |pi*k + --| ||
    \                  \    \       a / //
------------------------------------------
                               2          
             /               2\           
             |    /        2\ |           
           2 |    |       x | |           
          a *|1 + |pi*k + --| |           
             \    \       a / /           
$$\frac{8 x \left(- \frac{8 x^{2} \left(\pi k + \frac{x^{2}}{a}\right)^{2}}{a \left(\left(\pi k + \frac{x^{2}}{a}\right)^{2} + 1\right)} + 3 \pi k + \frac{5 x^{2}}{a}\right)}{a^{2} \left(\left(\pi k + \frac{x^{2}}{a}\right)^{2} + 1\right)^{2}}$$