CBSE Class 10 Answered
If the sum of first four terms of an AP is 40 and that first 14 terms is 280 .Find the sum of its first n terms
Asked by pirnceprince75 | 24 Nov, 2019, 19:53: PM
Expert Answer
Let the first term be 'a' and common difference be 'd'
Answered by Renu Varma | 25 Nov, 2019, 10:14: AM
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