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If (S_n=20100), what is the value of (n)?
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Answer and explanation
Correct answer: (200)
(S_{200}=\frac{200\times201}{2}=20100), so (n=200). Match (2S_n) with a consecutive product.
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What is the correct answer to this question?
(200)
Why is this the correct answer?
(S_{200}=\frac{200\times201}{2}=20100), so (n=200). Match (2S_n) with a consecutive product.
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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