In the sequence (21,26,31,36,\ldots), what is the value of (a+d)?
Answer and explanation
Correct answer: 26
In this AP, the first term is \(a=21\) and the common difference is \(d=26-21=5\). Therefore, \(a+d=21+5=26\), which is the second term of the sequence. \(31\) is the third term, \(a+2d\), so it is not correct. Exam tip: In an AP, the second term is always \(a+d\).
Frequently asked questions
What is the correct answer to this question?
26
Why is this the correct answer?
In this AP, the first term is \(a=21\) and the common difference is \(d=26-21=5\). Therefore, \(a+d=21+5=26\), which is the second term of the sequence. \(31\) is the third term, \(a+2d\), so it is not correct. Exam tip: In an AP, the second term is always \(a+d\).
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Arithmetic Progressions (AP). Topic: Introduction to APs and common difference..
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