Stitz-Zeager_College_Algebra_e-book

For each polynomial given below nd its real zeros and

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ity x. 5 3.1 Graphs of Polynomials 183 In order to solve Example 3.1.3, we made good use of the graph of the polynomial y = V (x). So we ought to turn our attention to graphs of polynomials in general. Below are the graphs of y = x2 , y = x4 , and y = x6 , side-by-side. We have omitted the axes so we can see that as the exponent increases, the ‘bottom’ becomes ‘flatter’ and the ‘sides’ become ‘steeper.’ If you take the the time to graph these functions by hand,7 you will see why. y = x2 y = x4 y = x6 All of these functions are even, (Do you remember how to show this?) and it is exactly because the exponent is even.8 One of the most important features of these functions which we can be seen graphically is their end behavior. The end behavior of a function is a way to describe what is happening to the function values as the x values approach the ‘ends’ of the x-axis:9 that is, as they become small without bound10 (written x → −∞) and, on the flip side, as they become large without boun...
View Full Document

This note was uploaded on 05/03/2013 for the course MATH Algebra taught by Professor Wong during the Fall '13 term at Chicago Academy High School.

Ask a homework question - tutors are online