Mathematics · Progression and Series
In an arithmetic progression whose common difference is non-zero, the sum of the first 3n terms is equal to the sum of the next n terms. Find the ratio of the sum of the first 2n terms to the sum of the next 2n terms.
- 15 : 1
- 21 : 5✓
- 31 : 10
- 410 : 1
Correct answer
1 : 5
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