DSE等差數列會怎麽出題?| Arithmetic Sequence and Summation

等差數列(arithmetic sequence)考點不多,記得求第一項a,公差(common difference)d,以此計算n項公式及求和(sum)公式便可

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如何計算一組獨立事件的概率 ? | Probability: Independent Events

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等比數列怎樣求和?| Arithmetic Sequence and Summation