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What is the general term of the sequence (-3,5,-7,9,\ldots)?
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Answer and explanation
Correct answer: (a_n=(-1)^n(2n+1))
The magnitude is (3,5,7,9,\ldots) and the signs start negative and alternate, so (a_n=(-1)^n(2n+1)). In alternating signs always check the sign of the first term.
Frequently asked questions
What is the correct answer to this question?
(a_n=(-1)^n(2n+1))
Why is this the correct answer?
The magnitude is (3,5,7,9,\ldots) and the signs start negative and alternate, so (a_n=(-1)^n(2n+1)). In alternating signs always check the sign of the first term.
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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