Which of the following functions has as its domain the se...

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705-805

Functions

Which of the following functions has as its domain the set of all real numbers?I.

f(x)=(64x)^\frac{1}{3}

II.

f(x)=\sqrt{2x^2-8x+8}

III.

f(x)=\frac{2}{2x^2-1}

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