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hbghlyj 发表于 2022-2-20 20:46 ⑴$T_n$是切比雪夫多项式,要证明从$x=T_{n-1}(\cos t),y=T_n(\cos t)$消去$\cos t$后得到的x,y的多项式是$n$次的
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2025-7-20 11:02 GMT+8
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