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What is the (n)th term of the sequence (11,31,59,95,139,\ldots)?
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Answer and explanation
Correct answer: (4n^2+8n-1)
The second differences are (8), and (4n^2+8n-1) gives all starting terms. In a quadratic sequence, test options on the first three terms.
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What is the correct answer to this question?
(4n^2+8n-1)
Why is this the correct answer?
The second differences are (8), and (4n^2+8n-1) gives all starting terms. In a quadratic sequence, test options on the first three terms.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: nth term.
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