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 / /
$$\frac{8 x \left(- \frac{8 x^{2} \left(\pi k + \frac{x^{2}}{a}\right)^{2}}{a \left(\left(\pi k + \frac{x^{2}}{a}\right)^{2} + 1\right)} + 3 \pi k + \frac{5 x^{2}}{a}\right)}{a^{2} \left(\left(\pi k + \frac{x^{2}}{a}\right)^{2} + 1\right)^{2}}$$