Afgeleide van $$$\operatorname{sech}{\left(u \right)}$$$
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Uw invoer
Bepaal $$$\frac{d}{du} \left(\operatorname{sech}{\left(u \right)}\right)$$$.
Oplossing
De afgeleide van de hyperbolische secans is $$$\frac{d}{du} \left(\operatorname{sech}{\left(u \right)}\right) = - \tanh{\left(u \right)} \operatorname{sech}{\left(u \right)}$$$:
$${\color{red}\left(\frac{d}{du} \left(\operatorname{sech}{\left(u \right)}\right)\right)} = {\color{red}\left(- \tanh{\left(u \right)} \operatorname{sech}{\left(u \right)}\right)}$$Dus, $$$\frac{d}{du} \left(\operatorname{sech}{\left(u \right)}\right) = - \tanh{\left(u \right)} \operatorname{sech}{\left(u \right)}$$$.
Antwoord
$$$\frac{d}{du} \left(\operatorname{sech}{\left(u \right)}\right) = - \tanh{\left(u \right)} \operatorname{sech}{\left(u \right)}$$$A