If (a=20) and (d=-5), what is the second term?
Answer and explanation
Correct answer: 15
In an AP, the second term is \(a_2=a+d\). Here, \(a_2=20+(-5)=20-5=15\). Therefore, option A is correct. 20 is the first term, while 25 would result if the common difference were \(+5\). Exam tip: Adding a negative common difference means subtracting its magnitude.
Frequently asked questions
What is the correct answer to this question?
15
Why is this the correct answer?
In an AP, the second term is \(a_2=a+d\). Here, \(a_2=20+(-5)=20-5=15\). Therefore, option A is correct. 20 is the first term, while 25 would result if the common difference were \(+5\). Exam tip: Adding a negative common difference means subtracting its magnitude.
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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