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What is the general term of the sequence (3,12,55,240,\ldots)?
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Answer and explanation
Correct answer: (a_n=4^n-n^2)
(4^n-n^2) gives (3,12,55,240). In exams, also check rules where a square is subtracted from a power.
Frequently asked questions
What is the correct answer to this question?
(a_n=4^n-n^2)
Why is this the correct answer?
(4^n-n^2) gives (3,12,55,240). In exams, also check rules where a square is subtracted from a power.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: Explicit or general rule.
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