Mathematics: If f(x) = (1/8)(8^x), what is f(3)?

If f(x) = (1/8)(8^x), what is f(3)? - id188311186542, firenation18

koranbutterton

14.02.2021

f(3)=64

Step-by-step explanation:

f(3)=(1/8)(8 cubed)

f(3)= 8 to the negative one times 8 cubed

f(3)= 8 squared

f(3)=64

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hello123485

25.11.2022

option c

Step-by-step explanation:

Based on the information given, you can write the following expression:

$y=\frac{k}{x^2}$

Where k is the the constant of variation

If y=7/4 when x=1, then you can substitute these values into the expression and solve for k:

$\frac{7}{4}=\frac{k}{1^2}\\k=1*\frac{7}{4}\\k=\frac{7}{4}$

Substitute k into the expression. Then the equation is:

$y=\frac{7}{4x^{2}}$

Substitute x=3 into the equation. Then, y is:

$y=\frac{7}{4(3)^{2}}=\frac{7}{36}}$

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