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mac1105_review_1

# mac1105_review_1 - REVIEW UNIT 1 L1 L7 FORMULAS TO MEMORIZE...

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REVIEW - UNIT 1 L1 – L7 FORMULAS TO MEMORIZE: if 0 if 0 x x x x x = < , 0 x 2 2 2 ( ) 2 x y x xy y + = + + 2 2 2 ( ) 2 x y x xy y = + 2 2 ( )( ) x y x y x y = + 3 3 2 2 ( )( ) x y x y x xy y = + + 3 3 2 2 ( )( ) x y x y x xy y + = + + 3 3 2 2 3 ( ) 3 3 x y x x y xy y + = + + + 3 3 2 2 3 ( ) 3 3 x y x x y xy y = + 2 x x = The Quadratic Formula: 2 4 2 b b ac x a ± = 1. Write without absolute value signs and simplify: (a) 2 2 1 1 x x x + − + (b) 5 3 π π (c) 312 4 1 r r + if 3 r > 2. Let 1 x = − and 3 y = . Evaluate: (a) 2 16 4 2 x y y x x y + ÷ ÷ + (b) 1 2 4 3 x y x y + 3. Let 1 4 3 0 0 3 15 1 { 2, , 4, , 8, , , , ,16 ,0.6} 3 0 0 5 2 A π = . List the elements that belong to each set: (a) Natural numbers, (b) Integers, (c) Rational numbers, (d) Irrational numbers, (e) Real numbers. 4. Perform the indicated operations and simplify: (a) 1 1 1 1 1 x x x x + + (b) 3 2 3 2 1 1 2 4 4 x x x x x + + +

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mac1105_review_1 - REVIEW UNIT 1 L1 L7 FORMULAS TO MEMORIZE...

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