hw1 - sakerwalla (hs9229) HW1 milburn (54685) 1 This...

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Unformatted text preview: sakerwalla (hs9229) HW1 milburn (54685) 1 This print-out should have 24 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Which, if any, of the following statements are true when a, b are real numbers? A. For all positive a and b , a + b = a + b . B. For all a and b , radicalBig ( a + b ) 2 = a + b . C. For all positive a and b , a b a + b = a b . 1. A only 2. none of them 3. A and B only 4. B and C only 5. B only 6. C only 7. A and C only 8. all of them 002 10.0 points Simplify the expression f ( x ) = 3 + 9 x 2 1 3 parenleftBig x x 2 4 parenrightBig as much as possible. 1. f ( x ) = 3( x + 2) 2 x 4 2. f ( x ) = 3( x 2) x 4 3. f ( x ) = x 2 x + 4 4. f ( x ) = x 2 2 x + 4 5. f ( x ) = x + 2 x + 4 6. f ( x ) = 3( x + 2) x 4 003 10.0 points Let f be the quadratic function defined by f ( x ) = 2 x 2 + 4 x + 20 . Use completing the square to find h so that f ( x ) = 2( x + h ) 2 + k for some value of k . 1. h = 2 2. h = 1 3. h = 2 4. h = 4 5. h = 1 004 10.0 points By removing absolute values, express f ( x ) = x 2 9 | x + 3 | as a piecewise-defined function. 1. f ( x ) = braceleftbigg x + 3 , x > 3 , ( x + 3) , x < 3 . sakerwalla (hs9229) HW1 milburn (54685) 2 2. f ( x ) = braceleftbigg 3 x , x > 3 , x 3 , x < 3 . 3. f ( x ) = braceleftbigg x 3 , x > 3 , 3 x , x < 3 . 4. f ( x ) = braceleftbigg x + 3 , x > 3 , ( x + 3) , x < 3 . 5. f ( x ) = braceleftbigg x 3 , x > 3 , 3 x , x < 3 ....
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hw1 - sakerwalla (hs9229) HW1 milburn (54685) 1 This...

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