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By using an analytic solution of the Teukolsky equation in the Kerr-de Sitterand Kerr-Newman-de Sitter geometries, an analytic expression of the absorptionrate formulae for these black holes is calculated.Comment: 11 pages, LaTeX. Several typos are correcte

Absorption Rate of the Kerr-de Sitter Black Hole and the Kerr-Newman-de Sitter Black Hole