【简答题】设数列{a n }是公差为d的等差数列,其前n项和为S n . (1)已知a 1 =1,d=2, (ⅰ)求当n∈N * 时, S n + n 的最小值; (ⅱ)当n∈N * 时,求证: 2 S 1 S 3 + 3 S 2 S 4 +…+ n+1 S n S n+2 < 5 16 ; (2)是否存在实数a 1 ,使得对任意n,关于m的不等式a m ≥n的最小解为3n-2?若存在,则求...
【简答题】Choose the BEST TERM to match the definition and translate the selected term into Clunese. A) Ablation L) Nanocomposites B) Adhesion M) Nettingindex C) Cohesi...