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Class 9 Mathematics Sequences and Progressions Sum of first n natural numbersHard

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What is the value of (S_{75}+S_{77}-2S_{76})?

Answer and explanation

Correct answer: (1)

(S_{77}=S_{76}+77) and (S_{75}=S_{76}-76), so the value is (1). Use differences of consecutive sums.

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Math Sequences Natural-Numbers Sum Sum Of First N Natural Numbers Sequences And Progressions Mathematics Class 9 Mcq

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