Pre-Calc Homework Solutions 147

Pre-Calc Homework Solutions 147 - Section 4.3 Find the...

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Find the zeros of y 0 : 5 0 2 x 4 2 27 x 2 1 54 5 0 x 2 55 } 27 6 4 3 ˇ 3 w 3 w } x 56 ! } 2 § 7 § 2 § 4 3 § ˇ § 3 w § 3 w } § < 6 1.56 Note that we do not use x ! } 2 § 7 § 1 § 4 3 § ˇ § 3 w § 3 w } § < 6 3.33, because these values are outside of the domain. (a) [ 2 3, 2 ˇ 6 w ] and [0, ˇ 6 w ] or, < [ 2 3, 2 2.45] and [0, 2.45] (b) [ 2 ˇ 6 w , 0] and [ ˇ 6 w , 3] or, < [ 2 2.45, 0] and [2.45, 3] (c) Approximately ( 2 1.56, 1.56) (d) Approximately ( 2 3, 2 1.56) and (1.56, 3) (e) Local maxima: ( 6 ˇ 6 w ,6 ˇ 3 w ) < ( 6 2.45, 10.39); local minima: (0, 0) and ( 6 3, 0) (f) < ( 6 1.56, 6.25) 23. y 95 } 1 1 1 x 2 } Since y 9. 0 for all x , y is always increasing. y 05 } d d x } (1 1 x 2 ) 2 1 52 (1 1 x 2 ) 2 2 (2 x ) 5 } (1 2 1 2 x x 2 ) 2 } Graphical support: [ 2 4, 4] by [ 2 2, 2]
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This note was uploaded on 10/05/2011 for the course MAC 1147 taught by Professor German during the Fall '08 term at University of Florida.

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