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Ͳ ֲ

, (. . ) . 0 f () . 1- , f () . . . 2- . ., = 1 1- f () = 0 ≤ 1 f () = 1 > 1. = 0 2- f () = sin 1/2. . . . , . . . ij: f () = 0, f () = 1, .