यदि (2, x+1, 3x-1, 14) अंकगणितीय श्रेणी के क्रमागत पद हैं, तो (x) का मान क्या है?
If (2, x+1, 3x-1, 14) are consecutive terms of an arithmetic progression, what is (x)?
Explanation opens after your attempt
B. (4)
Concept
The total difference (14-2=12) is split into three equal gaps, so (d=4), and the second term should be (6), hence (x=5). Splitting the total difference into equal parts is useful.
Why this answer is correct
The correct answer is B. (4). The total difference (14-2=12) is split into three equal gaps, so (d=4), and the second term should be (6), hence (x=5). Splitting the total difference into equal parts is useful.
Exam Tip
कुल अंतर (14-2=12) तीन बराबर भागों में बंटेगा, इसलिए (d=4) और (x+1=6) नहीं बल्कि दूसरा पद (6) होना चाहिए, अतः (x=5)। कुल अंतर को समान भागों में बांटना उपयोगी है।
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