Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Quantitative Aptitude Elementary Statistics

यदि x और \(\frac{1}{x}\) का समांतर माध्य K है, तो x2 और \(\frac{1}{x^2}\) का समांतर माध्य क्या होगा?

1
K2-1
2
2(K2 - 1)
3
2 K2 - 1
4
2K2 + 1
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