यदि समांतर श्रेणी के लगातार तीन पद (2x-1), (3x+2), (5x+1) हैं, तो समान अंतर क्या है?
If three consecutive terms of an arithmetic progression are (2x-1), (3x+2), (5x+1), what is the common difference?
Explanation opens after your attempt
D. (8)
Concept
From (2(3x+2)=(2x-1)+(5x+1)), (x=4), so the common difference is (14-7=7). Calculate (x) first and then the difference.
Why this answer is correct
The correct answer is D. (8). From (2(3x+2)=(2x-1)+(5x+1)), (x=4), so the common difference is (14-7=7). Calculate (x) first and then the difference.
Exam Tip
(2(3x+2)=(2x-1)+(5x+1)) से (x=4), इसलिए समान अंतर (14-7=7) नहीं बल्कि (14-7=7) है। सही गणना में (d=7) आता है।
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