( ) = S x ( S S * - S S * + S S * - S S * )(1 - x ) 0 0 1 1 2 2 3 3 г д е S 0 = x 0 , S 0 * = x 0 S = 1 - x , S 1 * = 1 - x - 1 1 S 2 = 1 - x + x 2 , S 2 * = 1 - x - 1 + x - 2 S = 1 - x + x 2 - x 3 S * = 1 - x - 1 + x - 2 - x - 3 3 3