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Class 9 Mathematics Sequences and Progressions Sum of first n natural numbersHardLevel 62

Find the value of (S_{64}+S_{84}-S_{74}).

Answer and explanation

Correct answer: (2875)

(S_{64}=2080), (S_{84}=3570), and (S_{74}=2775), so the value is (2875). In mixed sums, write each (S_n) separately.

Tags

mathsequencesnatural-numberssum

Frequently asked questions

What is the correct answer to this question?

(2875)

Why is this the correct answer?

(S_{64}=2080), (S_{84}=3570), and (S_{74}=2775), so the value is (2875). In mixed sums, write each (S_n) separately.

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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