If (x, x+7, x+14,\ldots) is an arithmetic progression, what is the difference between the second and first terms?
Answer and explanation
Correct answer: 7
The first term is x and the second term is x+7. Thus, second term − first term = (x+7)-x=7. Therefore, the common difference is 7. Note that x+7 is the second term, not the difference. Exam tip: To find the common difference of an AP, subtract a term from the term immediately after it.
Frequently asked questions
What is the correct answer to this question?
7
Why is this the correct answer?
The first term is x and the second term is x+7. Thus, second term − first term = (x+7)-x=7. Therefore, the common difference is 7. Note that x+7 is the second term, not the difference. Exam tip: To find the common difference of an AP, subtract a term from the term immediately after it.
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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