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Choose the function that expresses the relationship `7x+14y^3=2` as a function, `y = f(x)`, if possible.
`f(x)=root(3)((2-7 x)/14)`
This equation cannot be expressed as a function
`f(x)=(2-7 x)/14`
`f(x)=sqrt((2-7 x)/14),-sqrt((2-7 x)/14)`
Box 1:
Select the best answer
`2`
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