Prove the following formula for the derivative of the hyperbolic tangent,

*Proof.* We know from the previous two exercises (here and here that

Furthermore, we know from this exercise that

Thus, we can compute

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Stumbling Robot

A Fraction of a Dot
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Prove that the derivative of *tanh x* is *sech*^{2}x

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Prove the following formula for the derivative of the hyperbolic tangent,

*Proof.* We know from the previous two exercises (here and here that

Furthermore, we know from this exercise that

Thus, we can compute

Thank you

Whoa this really helped! Thanks, i kept getting tanh^2 x = 1 – tanh^2 x