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If (1+2+3+\cdots+n=946), choose the value of (n).
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Answer and explanation
Correct answer: (43)
(S_{43}=\frac{43\times44}{2}=946), so (n=43). Match (2S_n) with the product of two consecutive numbers.
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What is the correct answer to this question?
(43)
Why is this the correct answer?
(S_{43}=\frac{43\times44}{2}=946), so (n=43). Match (2S_n) with the product of two consecutive numbers.
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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