
Q3. If the sum of the first m terms of an AP is n and first n terms is m then show that sum of its first (m+n) terms is - (m+n)
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- 節目
- 發佈時間2020年10月15日 上午10:39 [UTC]
- 長度5 分鐘
- 年齡分級兒少適宜