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If the sum of the first (n) natural numbers is (1540), what will (n) be?
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Answer and explanation
Correct answer: (55)
\(S_{55}=\frac{55\times56}{2}=1540\), so \(n=55\). For a large sum, identify using \(2S_n\).
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What is the correct answer to this question?
(55)
Why is this the correct answer?
\(S_{55}=\frac{55\times56}{2}=1540\), so \(n=55\). For a large sum, identify using \(2S_n\).
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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