In the sequence (3,8,13,18,\ldots), what is the value of (a+2d)?
Answer and explanation
Correct answer: 13
In this AP, the first term is \(a=3\) and the common difference is \(d=8-3=5\). Therefore, \(a+2d=3+2(5)=13\). Hence, 13 is the correct option. The number 8 is the second term, whereas \(a+2d\) represents the third term of an AP. Exam tip: use \(a+(n-1)d\) to find the \(n\)th term.
Frequently asked questions
What is the correct answer to this question?
13
Why is this the correct answer?
In this AP, the first term is \(a=3\) and the common difference is \(d=8-3=5\). Therefore, \(a+2d=3+2(5)=13\). Hence, 13 is the correct option. The number 8 is the second term, whereas \(a+2d\) represents the third term of an AP. Exam tip: use \(a+(n-1)d\) to find the \(n\)th term.
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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