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09-08-2017
Mathematics

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Evaluate the function f(x)=4*7^x for x=-1 and x=2. show your work

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09-08-2017

remember, x^-1=1/x

so

f(-1)=4(7)^-1=4(1/7)=4/7
f(2)=4(7)^2=4(49)=196

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