Q: How do you evaluate rational function?

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Yes. Rational functions must contain rational expressions in order to be rational.

y = cuberoot(x) for real x is not a rational function.

A rational function is the quotient of two polynomial functions.

The domain of a rational function is the whole of the real numbers except those points where the denominator of the rational function, simplified if possible, is zero.

a rational function.

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Yes. Rational functions must contain rational expressions in order to be rational.

Yes. Rational functions must contain rational expressions in order to be rational.

Yes. Rational functions must contain rational expressions in order to be rational.

Yes. Rational functions must contain rational expressions in order to be rational.

True

It is a negative rational number. Whether it is for evaluate or anything else makes no difference.

a rational expression.

y = cuberoot(x) for real x is not a rational function.

It is true that a rational function is a function whose equation contains a rational expression. This is used in various math classes.

True

A rational function is the quotient of two polynomial functions.

That's the definition of a "rational function". You simply divide a polynomial by another polynomial. The result is called a "rational function".