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If (2a, 3a+1, 5a-1) are in an arithmetic progression, what will be the value of (a)?
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Answer and explanation
Correct answer: (3)
From (2(3a+1)=2a+(5a-1)), (6a+2=7a-1), so (a=3). The twice-middle-term rule works quickly for three terms.
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What is the correct answer to this question?
(3)
Why is this the correct answer?
From (2(3a+1)=2a+(5a-1)), (6a+2=7a-1), so (a=3). The twice-middle-term rule works quickly for three 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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