1111NotesSept28.pdf - September28,2017 Reviewfromlasttime...

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Math 1111 Power Functions 1 September 28, 2017 Review from last time: Graph. Is it a function? Domain: Range: x ­intercept: y ­intercept: The leftmost point can be found by reading the equation like it was a quadratic in vertex form. Or, graph on the calculator and just look; or use the TABLE. To find other points, choose x values so you can take the square root. If you mess up and don't get a "nice" answer, you can still graph it using the little box with an x in it.
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Math 1111 Power Functions 2 September 28, 2017 This is a little harder radical equation than we did in class last time. It becomes a quadratic after you square. Remember that you need to check all the answers for radical equations.
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Math 1111 Power Functions 3 September 28, 2017 Here's why you needed to check. One answer didn't work. You can tell that if you checked by plugging in , or you can see on the graph that there is only one solution. Solve. Now that we understand radical equations, and how to write them as rational exponents, we can solve more complicated equations.
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