Cha9 - Chapter 9 Joy Zhou 10-28-2009 Chapter 9 9.2, 9.3,...

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Unformatted text preview: Chapter 9 Joy Zhou 10-28-2009 Chapter 9 9.2, 9.3, 9.4, 9.5, 9.7, 9.8 9.2 (a) y = 1 / 5 x + 8 (1) x = 5( y- 8) (2) f- 1 ( x ) = 5( x- 8) (3) (b) y = 5 / ( x + 3) (4) h- 1 ( x ) = 5 /x- 3 (5) (c) y = 4 √ 3- x- 7 (6) y + 7 = 4 √ 3- x (7) 3- x = ( y + 7 4 ) 2 (8) g- 1 ( x ) = 3- ( y + 7 4 ) 2 (9) (d) 1 y- √ x = √ x- 1 (10) y 2- 2 √ xy + x = x- 1 (11) y 2- 2 √ xy + 1 = 0 (12) y 2 + 1 = 2 y √ x (13) √ x = y 2 + 1 2 y (14) j- 1 ( x ) = ( x 2 + 1 2 x ) 2 (15) (e) y = radicalbig 16- x 2 (16) x 2 = 16- y 2 (17) k- 1 ( x ) = radicalbig 16- x 2 (18) ≤ y ≤ 16. 9.3 (b) It is not one-to-one. (Horizontal Line Test). (c) y + 17 / 8 = 2( x- 3 / 4) 2 (19) ⇒ x- 3 / 4 = ± radicalbigg y + 17 / 8 2 (20) x ≥ 3 / 4 (21) ⇒ x- 3 / 4 = radicalbigg y + 17 / 8 2 (22) x = radicalbigg y + 17 / 8 2 + 3 / 4 (23) (d) x =- radicalbigg y + 17 / 8 2 + 3 / 4 (24) 2 9.5 y = f ( x ) = a + 1 x- a (25) y- a = 1 x- a (26) x- a = 1 y- a (27) x = 1 y- a + a (28) f- 1 ( x ) = 1 x- a + a (29) 9.7 Note: page 127 explains how to graph an inverse function: rotate by 90 degrees...
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This note was uploaded on 12/23/2009 for the course GEN GEN STUDIE taught by Professor Kellyshonttell during the Fall '09 term at University of Washington.

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Cha9 - Chapter 9 Joy Zhou 10-28-2009 Chapter 9 9.2, 9.3,...

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