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\(Let f(x) = 3x^2 - 7 and g(f(4)) = 9. What is g(f(-4))?\)

 Jun 19, 2019

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 #1
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f(x) is an even function, meaning that it is symmetrical about the y axis.

becasue \(3(+x)^2-7=3(-x)^2-7.\)

 

so f(4)=f(-4)

so   g(f(4))=g(f(-4))=9

 Jun 19, 2019
 #1
avatar+106913 
+2
Best Answer

f(x) is an even function, meaning that it is symmetrical about the y axis.

becasue \(3(+x)^2-7=3(-x)^2-7.\)

 

so f(4)=f(-4)

so   g(f(4))=g(f(-4))=9

Melody Jun 19, 2019

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