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If (S_n=16290), what is the value of (S_{n-8})?
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Answer and explanation
Correct answer: (14878)
(16290=S_{180}), so (S_{172}=\frac{172\cdot173}{2}=14878). Identify (n) first and then reduce it by (8).
Frequently asked questions
What is the correct answer to this question?
(14878)
Why is this the correct answer?
(16290=S_{180}), so (S_{172}=\frac{172\cdot173}{2}=14878). Identify (n) first and then reduce it by (8).
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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