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31-08-2017
Mathematics

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simplify f(-4)=2(3)^-4

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apologiabiology apologiabiology

31-08-2017

remember pemdas, order of oepratons
also
[tex]x^{-m}=\frac{1}{x^m}[/tex]

so

2(3)^-4 is 2 times 3^-4 so exponents first
[tex]3^{-4}=\frac{1}{3^4}=\frac{1}{81}[/tex]
now we got
2 times 1/81=2/81

so [tex]f(-4)=\frac{2}{81}[/tex]

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