olymmath

Putnam 1992 A2

  • Session A

Define C(α)C(\alpha) to be the coefficient of x1992x^{1992} in the power series about x=0x=0 of (1+x)α(1 + x)^\alpha. Evaluate ∫01(C(−y−1)∑k=119921y+k)dy.\int_0^1 \left( C(-y-1) \sum_{k=1}^{1992} \frac{1}{y+k} \right) dy.

Curated text Kedlaya Putnam archive. Quoted with source.

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