What is the range of the function?

The range of a function is the complete set of all possible resulting values of the dependent variable (y, usually), after we have substituted the domain. In plain English, the definition means: The range is the resulting y-values we get after substituting all the possible x-values.

1/800 is the right answer

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.