The first derivative
[src]
/ 2/a*x\\
a*|1 - tanh |---||
\ \ 2 //
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2
$$\frac{a \left(1 - \tanh^{2}{\left(\frac{a x}{2} \right)}\right)}{2}$$
The second derivative
[src]
2 / 2/a*x\\ /a*x\
a *|-1 + tanh |---||*tanh|---|
\ \ 2 // \ 2 /
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2
$$\frac{a^{2} \left(\tanh^{2}{\left(\frac{a x}{2} \right)} - 1\right) \tanh{\left(\frac{a x}{2} \right)}}{2}$$
The third derivative
[src]
3 / 2/a*x\\ / 2/a*x\\
-a *|-1 + tanh |---||*|-1 + 3*tanh |---||
\ \ 2 // \ \ 2 //
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4
$$- \frac{a^{3} \left(\tanh^{2}{\left(\frac{a x}{2} \right)} - 1\right) \left(3 \tanh^{2}{\left(\frac{a x}{2} \right)} - 1\right)}{4}$$