DLMF:14.7.E19 (Q4771)

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DLMF:14.7.E19
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    n = 0 𝖯 n ( x ) h n = ( 1 - 2 x h + h 2 ) - 1 / 2 , superscript subscript 𝑛 0 shorthand-Ferrers-Legendre-P-first-kind 𝑛 𝑥 superscript 𝑛 superscript 1 2 𝑥 superscript 2 1 2 {\displaystyle{\displaystyle\sum_{n=0}^{\infty}\mathsf{P}_{n}\left(x\right)h^{% n}=\left(1-2xh+h^{2}\right)^{-1/2},}}
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    DLMF:14.7.E19
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