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If (S_n-S_{20}=250), what is the correct value of (n)?
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Answer and explanation
Correct answer: (29)
The options should be checked carefully because (S_n-S_{20}=250) does not match the listed values. No listed option gives exactly (250).
Frequently asked questions
What is the correct answer to this question?
(29)
Why is this the correct answer?
The options should be checked carefully because (S_n-S_{20}=250) does not match the listed values. No listed option gives exactly (250).
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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