Pre-Calc Homework Solutions 145

Pre-Calc Homework Solutions 145 - Section 4.3 145 19. y 2,...

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19. y 95 h y 05 h Graphical support: [ 2 2, 3] by [–5, 3] (a) ( 2‘ ,1) (b) [1, ) (c) None (d) (1, ) (e) None (f) None 20. y e x y e x Since y 9 and y 0 are both positive on the entire domain, y is increasing and concave up on the entire domain. Graphical support: [0, 2 p ] by [0, 20] (a) [0, 2 p ] (b) None (c) (0, 2 p ) (d) None (e) Local (and absolute) maximum: (2 p , e 2 p ); local (and absolute) minimum: (0, 1) (f) None 21. y xe 1/ x 2 ( 2 2 x 2 3 ) 1 ( e 1/ x 2 )(1) 5 e 1/ x 2 (1 2 2 x 2 2 ) 5 e 1/ x 2 1 } x 2 x 2 2 2 } 2 x , 1 x . 1 0, 2 2, x , 1 x . 1
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