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If (a_n=15-3n), what is the second term?
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Answer and explanation
Correct answer: 9
For the second term, substitute n=2: \(a_2=15-3(2)=15-6=9\). Therefore, the correct answer is 9. The value 12 is obtained when \(n=1\), so it is the first term, not the second. Exam tip: In an nth-term formula, substitute the required term number carefully for \(n\).
Frequently asked questions
What is the correct answer to this question?
9
Why is this the correct answer?
For the second term, substitute n=2: \(a_2=15-3(2)=15-6=9\). Therefore, the correct answer is 9. The value 12 is obtained when \(n=1\), so it is the first term, not the second. Exam tip: In an nth-term formula, substitute the required term number carefully for \(n\).
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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