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Use the Negative Exponent Property.
Use the Negative Exponent Property.
Expression | Evaluation |
---|---|
(-3)^(-8) | 1/6561 |
-3^(-8) | -1/6561 |
Expression | Evaluation |
---|---|
(-3)^(-9) | -1/19 683 |
-3^(-9) | -1/19 683 |
We are asked to evaluate the following expressions. (-3)^(-8) and-3^(-8) To do this we will use the Negative Exponent Property.
Negative Exponent Property |
If a is a non-zero real number, then the following equation is true. a^(- n)=1/a^n |
Split into factors
a^(m* n)=(a^m)^n
(- a)^2=a^2
Calculate power
Rewrite (9)^4 as 9*9*9*9
Multiply
Split into factors
a^(m* n)=(a^m)^n
Expression | Evaluation |
---|---|
(-3)^(-8) | 1/6561 |
-3^(-8) | -1/6561 |
This time we will evaluate the following expressions. (-3)^(-9) and-3^(-9) Like in the previous part, we will use the Negative Exponent Property.
Negative Exponent Property |
If a is a non-zero real number, then the following equation is true. a^(- n)=1/a^n |
Split into factors
a^(m* n)=(a^m)^n
a^3=a* a* a
Multiply
a^3=a* a* a
Multiply
Put minus sign in front of fraction
Split into factors
a^(m* n)=(a^m)^n
Expression | Evaluation |
---|---|
(-3)^(-9) | -1/19 683 |
-3^(-9) | -1/19 683 |
The expressions turned out to be equal!