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Choose the function that expresses the relationship `5x+8y^3=6` as a function, `y = f(x)`, if possible.
`f(x)=(6-5 x)/8`
`f(x)=sqrt((6-5 x)/8),-sqrt((6-5 x)/8)`
`f(x)=root(3)((6-5 x)/8)`
This equation cannot be expressed as a function
Box 1:
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