Question

Дано b(n) B(1)=2 B(2)=6 S(5)=?

Answer 1

1)q равно 3 (q=bn+1/bn)

2)S5 = 2*(2 в степени 3 -1)/3-1(Sn=b1(qn-1/q-1)

3)2*7/2

4)14/2

Ответ: 7

Answer 2

It seems like there might be some confusion in the notation you provided. The given sequence "b(n)" is not well-defined, and the notation "B(1)=2 B(2)=6" is unclear. However, you mentioned "S(5)=?", which might suggest that you want to find the value of a sum or a sequence S(n) at n=5.

To help you further, please provide more information or clarify the notation for "b(n)" or "S(n)" and any relevant formulas or patterns associated with them. Once I have a clear understanding of the problem, I'll be happy to assist you in finding the value of S(5) or solving the given sequence.