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

If arithmetic mean of x and \(\frac{1}{x}\) is K, then the arithmetic of mean of x² and \(\frac{1}{x^2}\) will be.

1

K²-1

2

2(K² - 1)

3

2 K² - 1

4

2K² + 1

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