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What is the value of (S_{49}+S_{51}-2S_{50})?
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Answer and explanation
Correct answer: (1)
(S_{51}=S_{50}+51) and (S_{49}=S_{50}-50), so the value is (1). Use differences of consecutive sums.
Frequently asked questions
What is the correct answer to this question?
(1)
Why is this the correct answer?
(S_{51}=S_{50}+51) and (S_{49}=S_{50}-50), so the value is (1). Use differences of consecutive sums.
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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