Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 3 - Section 3.2 - Polynomial Functions and Their Graphs - 3.2 Exercises - Page 266: 23

Answer

From the far left to the far right, the graph - falls from the upper far left, - crosses the x axis at $(0.0)$, falling, - turns and touches the x axis at $(2,0)$ where it - turns down to fall to the lower far right

Work Step by Step

$P(x)=-2x(x-2)^{2}$ End behavior: When $ x\rightarrow-\infty$ , $-2x$ is positive, $(x-2)^{2}$is positive, $P(x)$ is positive to the far left. When $ x\rightarrow+\infty$ , $-2x$ is negative, $(x-2)^{2}$ is positive, $P(x)$ is negative to the far right. Intercepts: $ x=0,\quad x-2=0$ x-intercepts: $x=0$, single (graph crosses x) $x=2$, double (graph touches x and turns)$.\\\\$ y-intercept: $(0,0)$ From the far left to the far right, the graph - falls from the upper far left, - crosses the x axis at $(0.0)$, falling, - turns and touches the x axis at $(2,0)$ where it - turns down to fall to the lower far right
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