किस (r) के लिए \(9, 9+r, 9+4r, 9+9r,\ldots\) अंकगणितीय श्रेणी होगी?
For which (r) will \(9, 9+r, 9+4r, 9+9r,\ldots\) be an arithmetic progression?
Explanation opens after your attempt
A. केवल (r=0)Only (r=0)
Concept
The consecutive differences are (r,3r,5r), which are equal only when (r=0). In such questions it is necessary to write all consecutive differences.
Why this answer is correct
The correct answer is A. केवल (r=0) / Only (r=0). The consecutive differences are (r,3r,5r), which are equal only when (r=0). In such questions it is necessary to write all consecutive differences.
Exam Tip
क्रमागत अंतर (r,3r,5r) हैं, ये समान तभी होंगे जब (r=0)। ऐसे प्रश्नों में सभी क्रमागत अंतर लिखना जरूरी है।
Login to save your score, XP, coins and progress.
