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What is the (n)th term of the sequence (4,10,18,28,40,\ldots)?
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Answer and explanation
Correct answer: (n^2+3n)
The second differences are (2), and the terms match (n^2+3n). Equal second differences suggest a quadratic rule.
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What is the correct answer to this question?
(n^2+3n)
Why is this the correct answer?
The second differences are (2), and the terms match (n^2+3n). Equal second differences suggest a quadratic rule.
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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