2.8 The Reciprocal of a Real Number Objective: To simplify expressions involving reciprocals. Warm – up: Multiply: 1) 20(-5)2) 7a(-3b) 3) 76(-85)(0)4)

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Presentation transcript:

2.8 The Reciprocal of a Real Number Objective: To simplify expressions involving reciprocals. Warm – up: Multiply: 1) 20(-5)2) 7a(-3b) 3) 76(-85)(0)4) (-3 + 8y)(-2) 5) (-1)(-4x – y + 7)6) 3x(2 + 5)

2.8 The Reciprocal of a Real Number Definition o Two numbers whose product is 1 are called reciprocals (or multiplicative inverses) of each other. o What number time ½ equals 1? That number is the reciprocal of ½! o Property of Reciprocals: State the reciprocal of the following. o7o7 o⅙o⅙ o -9 o⅜o⅜ o6o6 o -⅘ o -1 o 0.25

2.8 The Reciprocal of a Real Number Simplify the following. Are they reciprocals? o o o o o o o o o o

2.8 The Reciprocal of a Real Number o o o o o Homework: – Pg. 81 Written Exercises #1 – 33 odd