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Class 9 Mathematics Sequences and Progressions Sum of first n natural numbersExpertLevel 60

If (S_n=7140), what is the value of (S_{n+5}-S_n)?

Answer and explanation

Correct answer: (605)

(7140=S_{119}), so the difference is (120+121+122+123+124=610). The correct option should be (D).

Tags

sequencesprogressionsnatural-numbersnext-terms

Frequently asked questions

What is the correct answer to this question?

(605)

Why is this the correct answer?

(7140=S_{119}), so the difference is (120+121+122+123+124=610). The correct option should be (D).

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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