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Find the domain of the function f(x) = √(3^x -1 + 5^x - 1 + 7^x - 1 - 83)

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Find the domain of the function

f(x) = √(3x -1 + 5x - 1 + 7x - 1 - 83)

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The function f is defined for

⇒ 3x–1 + 5x–1 + 7x–1 – 83 ≥ 0

⇒ 3x–1 + 5x–1 + 7x–1 ≥ 83

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