DLMF:18.5#Ex5 (Q5526)

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DLMF:18.5#Ex5
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    Defining formula
    T 4 ⁡ ( x ) = 8 ⁢ x 4 - 8 ⁢ x 2 + 1 , Chebyshev-polynomial-first-kind-T 4 𝑥 8 superscript 𝑥 4 8 superscript 𝑥 2 1 {\displaystyle{\displaystyle T_{4}\left(x\right)=8x^{4}-8x^{2}+1,}}
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    DLMF id
    DLMF:18.5#Ex5
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