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: 1,1,2,3,5,8,13.21,34,55,89---------- ..

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: 1,1,2,3,5,8,13.21,34,55,89---------- .: 1 1 = + = 1+1=2 1,1,2 = + = 1+2=3 1123 = + = 3+2 =5 1,1,2,3,5 .

: : 1. 4, 5, 9, __ 2. 7, 9, 16, 25, ___ 3. 3, 5, 8, __, 21, 34 4. 22, 23, 45, ___, 113, 208 5. ___, 24, 32, ___, 88

1175 1250 . . . .

: Liber abaci

:1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584 4 . 2/1 = 2.0 3/2 = 1.5 5/3 = 1.67 8/5 = 1.6 13/8 = 1.625 21/13 = 1.6154 34/21 = 1.6190 55/34 = 1.6176 89/55 = 1.6182 144/89 = ? 233/144 = ? 377/233 = ? 610/377 = ? 987/610 = ? 1597/987 = ? 2584/1597 =?