Zero and Negative Exponents

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Presentation transcript:

Zero and Negative Exponents 8.2 Goal Evaluate powers that have zero or negative exponents. Key Words zero exponent negative exponent reciprocal

Observe the chart. Establish a pattern. Can you predict the last three values? 1 1/2 1/4

Powers with Zero Exponents EXAMPLE 1 Powers with Zero Exponents Evaluate the expression. 1 1 1 1

Powers with Negative Exponents EXAMPLE 2 Powers with Negative Exponents Evaluate the expression. 81 1/4

1 25 Evaluate the expression. Checkpoint Evaluate Exponential Expression Evaluate the expression. 1 25

Evaluate Exponential Expressions EXAMPLE 3 Evaluate Exponential Expressions Evaluate the expression. 1 64

Checkpoint Evaluate Exponential Expression Evaluate the expression. 27

= yx Evaluate Expressions with a Calculator EXAMPLE 4 Evaluate Expressions with a Calculator Use a calculator to evaluate the expression. yx + / – =

Simplify Exponential Expressions EXAMPLE 5 Simplify Exponential Expressions Rewrite the expression with positive exponents.

3x2 Evaluate the expression. Checkpoint Evaluate Exponential Expression Evaluate the expression. 3x2

Homework