Pre-Calc Homework Solutions 142

Pre-Calc Homework Solutions 142 - 142 Section 4.3 14. y 4x...

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14. y 952 4 x 3 1 12 x 2 2 4 Using grapher techniques, the zeros of y 9 are x < 2 0.53, x < 0.65, and x < 2.88. y 052 12 x 2 1 24 x 52 12 x ( x 2 2) Graphical support: [ 2 2, 4] by [ 2 20, 20] (a) ( 2‘ , 2 0.53] and [0.65, 2.88] (b) [ 2 0.53, 0.65] and [2.88, ) (c) (0, 2) (d) ( 2‘ , 0) and (2, ) (e) Local maxima: ( 2 0.53, 2.45) and (2.88, 16.23);local minimum: (0.65, 2 0.68) Note that the local maximum at x < 2.88 is also an absolute maximum. (f) (0,1) and (2, 9) 15. y 95 } 2 5 } x 2 4/5 y 052} 2 8 5 } x 2 9/5 Graphical support: [ 2 6, 6] by [ 2 1.5, 7.5] (a) ( 2‘ , ) (b) None (c) ( 2‘ ,0) (d) (0, ) (e) None (f) (0, 3) 16. y 952} 1 3 } x 2 2/3 142 Section 4.3 Intervals
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