(Section 1.3: Basic Graphs and Symmetry) 1.3.11PART H :fx()=x0Let =x0. What is f0? It is agreed that 02=0and 20=1, but what is 00? Different sources handle the expression 00differently. • If 00is undefined, then =1x±0, andfhas the graph below. •• There is a holeat the point 0, 1. • There are many reasons to define 00to be 1. For example, when analyzing polynomials, it is convenient to have x0=1for all real xwithout having to consider x=0as a special case. Also, this will be assumed when we discuss
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