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At which (n) will (S_n) first become greater than (10000)?
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Answer and explanation
Correct answer: (141)
(S_{140}=9870) and (S_{141}=10011), so it first exceeds (10000) at (n=141). In boundary questions, check the previous and next sums.
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What is the correct answer to this question?
(141)
Why is this the correct answer?
(S_{140}=9870) and (S_{141}=10011), so it first exceeds (10000) at (n=141). In boundary questions, check the previous and next sums.
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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