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.

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490