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If (a_n=n^2+2), what is the fifth term?
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Answer and explanation
Correct answer: 27
For the fifth term, substitute \(n=5\) in the formula: \(a_5=5^2+2=25+2=27\). Hence, 27 is correct. The value 25 is only \(5^2\); the additional 2 must also be included. Exam tip: Substitute the required value of \(n\) first, then follow the order of operations carefully.
Frequently asked questions
What is the correct answer to this question?
27
Why is this the correct answer?
For the fifth term, substitute \(n=5\) in the formula: \(a_5=5^2+2=25+2=27\). Hence, 27 is correct. The value 25 is only \(5^2\); the additional 2 must also be included. Exam tip: Substitute the required value of \(n\) first, then follow the order of operations carefully.
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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