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What is the value of (S_{42}+S_{84}+S_{126})?
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Answer and explanation
Correct answer: (12484)
(S_{42}=903), (S_{84}=3570), and (S_{126}=8001), so the total is (12474). Write all three sums separately and add.
Frequently asked questions
What is the correct answer to this question?
(12484)
Why is this the correct answer?
(S_{42}=903), (S_{84}=3570), and (S_{126}=8001), so the total is (12474). Write all three sums separately and add.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: Sum of first n natural numbers.
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