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OpenStudy (anonymous):
What is the value of f(x) = 9^x when x = -2? A.1/81 B. 81 C.1/18 D. 18
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OpenStudy (skullpatrol):
Any ideas?
OpenStudy (anonymous):
A
OpenStudy (anonymous):
1/81
OpenStudy (skullpatrol):
$$\Huge a^{-n} = \frac{1}{a^n}$$
OpenStudy (anonymous):
thanks!
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OpenStudy (skullpatrol):
thanks for asking :)
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