Question

Question 4 of 10
The value-2 is a lower bound for the zeros of the function shown below
f(x) = 4x^3 - 12x^2 - x +15
O A. True
O B. False
​

Answer 1

Answer:

A

Step-by-step explanation:

ab brilliant

bnado...mkk

Answer 2

Answer:

true

Step-by-step explanation:

The value -2 is a lower bound for the zeros of the function shown below f(x)=4x^3-12x^2-x+15

So, firstly, we will find value of f(x) at x=-2

we will plug x=-2 into f(x)

we get

we will plug x=-2

now, we can simplify it

so,

we know that any zeros always lies between positive and negative value

Here , we got f(-3)=-63 ...which is negative value

so, this is lower bound