Question

(1)(-an-b)=0,求實數(shù)a、b的值;

(2)已知數(shù)列{a_n}滿足條件a₁=1,a₂=r(r＞0),且{a_n·a_n+1}是公比為q(q＞0)的等比數(shù)列,b_n=a_2n-1+a_2n(n=1,2,…).求b_n和,其中S_n=b₁+b₂+…+b_n.

Answer 1

(1)a=1,b=-1.

(2)b_n=(1+r)·q^n-1,