यदि (2x+1), (3x+6), (5x+5) समांतर श्रेणी के लगातार तीन पद हैं, तो (x) का मान क्या है?
If (2x+1), (3x+6), (5x+5) are three consecutive terms of an arithmetic progression, what is (x)?
Explanation opens after your attempt
B. (6)
Concept
For three consecutive terms, (2(3x+6)=(2x+1)+(5x+5)), giving (x=6). The middle term is the average of the two surrounding terms.
Why this answer is correct
The correct answer is B. (6). For three consecutive terms, (2(3x+6)=(2x+1)+(5x+5)), giving (x=6). The middle term is the average of the two surrounding terms.
Exam Tip
लगातार तीन पदों में (2(3x+6)=(2x+1)+(5x+5)), इससे (x=6) मिलता है। बीच वाला पद दोनों ओर के पदों का औसत होता है।
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