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

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If (1+2+3+\cdots+n=1176), what is the value of (n)?

Answer and explanation

Correct answer: (48)

(S_{48}=\frac{48\times49}{2}=1176), so (n=48). Verify the answer by substituting it back in the formula.

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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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