Need some help again. -2^-3 = ? The answer in the book is -9/8 I thought it would be -1/8. Help please! Jerry
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$\displaystyle -2^{-3}$ $\displaystyle = -\frac {1}{2^3}$ $\displaystyle = -\frac {1}{8}$ The book is wrong.
Originally Posted by Jerry Cunningham Need some help again. -2^-3 = ? The answer in the book is -9/8 I thought it would be -1/8. Help please! Jerry $\displaystyle a^{-b}=\frac{1}{a^{b}}$...therefore in this case since it is $\displaystyle -2^{-3}=\frac{1}{-2^3}=\frac{1}{-8}=\frac{-1}{8}$
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