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A finite AP (a,a+d,a+2d,a+3d) is reversed as (a+3d,a+2d,a+d,a). What is the common difference of the new order?
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Answer and explanation
Correct answer: (-d)
In the reversed order, each step subtracts (d), so the new difference is (-d). In exams, reversing the order can change the sign of the difference.
Frequently asked questions
What is the correct answer to this question?
(-d)
Why is this the correct answer?
In the reversed order, each step subtracts (d), so the new difference is (-d). In exams, reversing the order can change the sign of the difference.
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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