已知数列{x n }满足x 1 =x 2 =1并且 x n+1 x n =λ x n x n-1 ,(λ 为非零参数,n=2,3,4,…). (1)若x 1 、x 3 、x 5 成等比数列,求参数λ的值; (2)设0<λ<1,常数k∈N * 且k≥3,证明 x 1+k x 1 + x 2+k x 2 +…+ x n+k x n < λ k 1- λ k (n∈ N * ).
【简答题】Have you ever thought of the similarities between the cinema and the theatre? The cinema has learnt a great deal from the theatre about presentation. Gone are the days when crowds were packed on woode...