Which of the following possible rational roots is a root of the function f(x)=x^3-3x^2+5x-15? * 5 points
-3
-1
1
3

Given:

The function is

To find:

The root of the function from the given possible roots.

Solution:

We have,

At x=-3,

At x=-1,

At x=1,

At x=3,

Since, the value of given function is 0 at only x=3, therefore 3 is a root of given function.

Hence, the correct option is D.

the correct answer is the last option