posted by Melissa
My teacher said this: "Please explain how you can tell if the multiplicity is odd or even. Then explain how you can tell if the multiplicity will be 1 or some odd number greater than 1." about some questions in my homework about graphing polynomials, can someone help me?
if a factor (x-h) occurs n times, it has a multiplicity of n.
Looking at the graph, if a root has odd multiplicity, the graph crosses the x-axis there. Think of y=x^3
If the multiplicity is even, the graph just touches the x-axis and turns back. Think of y=x^2
Take a look here for an example:
y = (x+2)^2 * (x-1)^3