If (a_n=25+n), what is the value of (a_6)?
Answer and explanation
Correct answer: 31
Given \(a_n=25+n\), substitute \(n=6\) for the sixth term: \(a_6=25+6=31\). Hence, 31 is the correct option. The value 30 would result from using \(n=5\), so it is a close but incorrect distractor. Exam tip: carefully substitute the required term number for \(n\) in the general term.
Frequently asked questions
What is the correct answer to this question?
31
Why is this the correct answer?
Given \(a_n=25+n\), substitute \(n=6\) for the sixth term: \(a_6=25+6=31\). Hence, 31 is the correct option. The value 30 would result from using \(n=5\), so it is a close but incorrect distractor. Exam tip: carefully substitute the required term number for \(n\) in the general 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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