क्रम (81, 27, 9, 3) को समांतर श्रेणी मानने में कौन-सी गलती होगी?
What mistake is made if (81, 27, 9, 3) is considered an arithmetic progression?
Explanation opens after your attempt
B. अनुपात समान है, अंतर समान नहींThe ratio is constant, not the difference
Concept
This sequence has ratio \(\frac{1}{3}\), but differences (-54, -18, -6) are not equal. In an arithmetic progression, check difference, not ratio.
Why this answer is correct
The correct answer is B. अनुपात समान है, अंतर समान नहीं / The ratio is constant, not the difference. This sequence has ratio \(\frac{1}{3}\), but differences (-54, -18, -6) are not equal. In an arithmetic progression, check difference, not ratio.
Exam Tip
इस क्रम में अनुपात \(\frac{1}{3}\) है, पर अंतर (-54, -18, -6) बराबर नहीं हैं। समांतर श्रेणी में अनुपात नहीं, अंतर देखें।
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