线性数列和计算器
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Calculate
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Review the inputs, then select Calculate.Calculation formula
第 n 项 = first+(n-1)*difference；前 n 项之和 = n*(first+last)/2
- first
- 首项
- difference
- 公差
- n
- 项数
Enter values to see results and the formula.
Example values are ready
Review the inputs, then select Calculate.第 n 项 = first+(n-1)*difference；前 n 项之和 = n*(first+last)/2