【简答题】已知函数 f(x)=1+ 2 x ,数列{x n }满足x 1 = 11 7 ,x n+1 =f(x n );若b n = 1 x n -2 + 1 3 . (1)求证数列{b n }是等比数列,并求其通项公式; (2)若c n =3 n -λb n (λ为非零整数,n∈N*),试确定λ的值,使得对任意n∈N*,都有c n+1 >c n 成立.
【简答题】Fill in the blanks by using appropriate words in the text, the first letter in each blank was given to help you. 1. Immediately the 1) r_____ d lawyer Clarence Darrow offered his services to defend m...
【简答题】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 * ).
【单选题】等比数列1,x,x2,x3,...,xn-1,...前n项的和
【简答题】______ s Modern Painters was written to defend J. M. W. Turner, the English landscape painter, against the attacks on his painting made by the conventional critics of the day.
【判断题】焊条牌号为Z408的铸铁焊条是纯镍铸铁焊条。 ()
【简答题】John Ruskin s______was written to defend J. M. W. Turner, the English landscape painter, against the attacks on his paintings made by the conventional critics of the day.
【简答题】焊条牌号为Z408的铸铁焊条是纯镍铸铁焊条 本题为判断题,请判断对与错,谢谢!
【简答题】下图是DRAM芯片的逻辑结构图,分析与SRAM的不同点