Prove the following identity:

* Proof. * We know from a previous exercise (Section 6.19, Exercise #9) that

Therefore, we have

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Stumbling Robot

A Fraction of a Dot
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Prove that *(cosh x + sinh x)*^{n} = cosh (nx) + sinh (nx)

Prove the following identity:

* Proof. * We know from a previous exercise (Section 6.19, Exercise #9) that

Therefore, we have