If an arithmetic progression has (a=10) and (d=-1), what are the first four terms?
Answer and explanation
Correct answer: (10, 9, 8, 7)
The first term is 10, and each subsequent term is obtained by adding d=-1 to the previous term. Thus, the terms are 10, 10-1=9, 9-1=8, and 8-1=7. Option B uses a common difference of +1, while option D uses -2. Exam tip: a negative common difference produces decreasing terms.
Frequently asked questions
What is the correct answer to this question?
(10, 9, 8, 7)
Why is this the correct answer?
The first term is 10, and each subsequent term is obtained by adding d=-1 to the previous term. Thus, the terms are 10, 10-1=9, 9-1=8, and 8-1=7. Option B uses a common difference of +1, while option D uses -2. Exam tip: a negative common difference produces decreasing terms.
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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