chrisjohnson43 chrisjohnson43
  • 16-07-2018
  • Mathematics
contestada

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

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 28-07-2020

Answer:

  a) true

Step-by-step explanation:

The bottom-line numbers from synthetic division alternate signs, indicating that -2 is a lower bound. The given statement is true.

__

If the signs were all positive, it would indicate the proposed zero is an upper bound.

__

A graph shows all real zeros are greater than -2.

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