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Which is the (n)th term of the sequence (18,34,54,78,106,\ldots)?
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Answer and explanation
Correct answer: (2n^2+10n+6)
The second differences are (4), and (2n^2+10n+6) gives the starting terms. Confirm a quadratic rule using the first three terms.
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What is the correct answer to this question?
(2n^2+10n+6)
Why is this the correct answer?
The second differences are (4), and (2n^2+10n+6) gives the starting terms. Confirm a quadratic rule using 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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