【简答题】设等差数列 的前 项和为 ,且 , . (Ⅰ)求数列 的通项公式; (Ⅱ)设数列 的前 项和为 ,且 ( 为常数),令 ,求数列 的前 项和 。
【简答题】应采取一个原始平均式样的物料的总量称为____。
【单选题】合理用药是健康的生活习惯,有关用药的认识,正确的是
【单选题】合理用药是健康的生活习惯之一,下列有关用药的一些认识,正确的是
【判断题】广东为稀有金属和有色金属之乡。() P116
【单选题】合理用药是健康的生活习惯之一,下列有关人们用药的一些认识,正确的是( )
【单选题】Theo needs $40,000 as a down payment for a house 6 years from now. He earns 2.5 percent on his savings. Theo can either deposit one lump sum today for this purpose or he can wait a year and deposit a ...
【单选题】Theo’s BBQ has $48,000 in current assets and $39,000 in current liabilities. Decisions related to these accounts as referred to as:
A.
capital structure decisions.
B.
capital budgeting decisions.
C.
working capital management.