DLMF:4.39.E1 (Q1970)

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DLMF:4.39.E1
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    Statements

    Defining formula
    tanh ⁡ z = z 1 + z 2 3 + z 2 5 + z 2 7 + ⋯ , 𝑧 continued-fraction 𝑧 1 continued-fraction superscript 𝑧 2 3 continued-fraction superscript 𝑧 2 5 continued-fraction superscript 𝑧 2 7 ⋯ {\displaystyle{\displaystyle\tanh z=\cfrac{z}{1+\cfrac{z^{2}}{3+\cfrac{z^{2}}{% 5+\cfrac{z^{2}}{7+\cdots}}}},}}
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    DLMF id
    DLMF:4.39.E1
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