Предмет: Алгебра, автор: Solovey174

Помогите плизз.
Последовательность задана условиями b1=3, b2=4, bn+1=bn-1+bn.

Приложения:

Ответы

Автор ответа: Аноним

10

b1 = 3; b2 = 4; b(n + 1) = b(n -1) + b(n)
b3 = b1 + b2 = 3 + 4 = 7
b4 = b2 + b3 = 4 + 7 = 11
b5 = b3 + b4 = 7 + 11 = 18
b6 = 11 + 18 = 29
b7 = 18 + 29 = 47
b8 = 29 + 47 = 76
b9 = 47 + 76 = 123
Ответ: 8 членов этой последовательности меньше 100

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