Answer: Options C, D and E
Step-by-step explanation:
A polinomial function that only involves non-negative integer powers of the variable. so they have the form
a*x^n + .... g*x^1 * h
where a, g, h are constants.
In the first option, you can see that you have a 2/x term, so this has a negative power of x, then this is not a plynomial function.
The second option has a square root, that is defined as a x^(1/2) which is not an integer power, so this option can be discarded.
The other 3 options are polynomial functions.
