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If (S_n=4095), what will be the value of (n)?
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Answer and explanation
Correct answer: (90)
(S_{90}=\frac{90\times91}{2}=4095), so (n=90). Matching (2S_n) with a consecutive product is useful.
Frequently asked questions
What is the correct answer to this question?
(90)
Why is this the correct answer?
(S_{90}=\frac{90\times91}{2}=4095), so (n=90). Matching (2S_n) with a consecutive product is useful.
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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