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$F (x) = 1 - \frac{1}{3^{x}}$ এর বিপরীত ফাংশন কোনটি?

\log_{3} (x - 1)

\log_{3} (1 - x)

\log_{3} (\frac{1}{x - 1})

\log_{3} (\frac{1}{1 - x})

ANS : 4

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