Question
Hard
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Let be the sum of the first 20 terms and be the sum of the first 40 terms of the series . If , then is equal to
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Text solutionVerified
Exp. (b)
We have,
sum of first 20 terms
sum of first 40 terms
Now,
We have,
sum of first 20 terms
sum of first 40 terms
Now,
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Question Text | Let be the sum of the first 20 terms and be the sum of the first 40 terms of the series . If , then is equal to |
Updated On | Nov 24, 2023 |
Topic | Sequences and Series |
Subject | Mathematics |
Class | Class 11 |
Answer Type | Text solution:1 Video solution: 11 |
Upvotes | 1223 |
Avg. Video Duration | 9 min |