- #1

toddlinsley79

- 6

- 0

## Homework Statement

Let f(x)=a0+a1x+a2x

^{2}+a3x

^{3}+a4x

^{4}. Show that if a0a4<0, then f(x)=0 have at least 2 real solutions.

## Homework Equations

## The Attempt at a Solution

Any hints? I can't tell how to begin an attempt for a solution.