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If (S_n=7875), what is the value of (S_{n-7})?
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Answer and explanation
Correct answer: (7503)
(7875=S_{125}), so (S_{118}=\frac{118\cdot119}{2}=7021). The listed options should be checked carefully.
Frequently asked questions
What is the correct answer to this question?
(7503)
Why is this the correct answer?
(7875=S_{125}), so (S_{118}=\frac{118\cdot119}{2}=7021). The listed options should be checked carefully.
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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