If (a_n=12n+1), what is the second term?
Answer and explanation
Correct answer: 25
To find the second term, substitute \(n=2\) in the formula: \(a_2=12\times2+1=24+1=25\). Therefore, the correct answer is 25. The value 24 is only \(12\times2\); the \(+1\) in the formula has not yet been added. Exam tip: For an \(n\)th-term question, first substitute the required value of \(n\) correctly.
Frequently asked questions
What is the correct answer to this question?
25
Why is this the correct answer?
To find the second term, substitute \(n=2\) in the formula: \(a_2=12\times2+1=24+1=25\). Therefore, the correct answer is 25. The value 24 is only \(12\times2\); the \(+1\) in the formula has not yet been added. Exam tip: For an \(n\)th-term question, first substitute the required value of \(n\) correctly.
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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