Question

If f(x)=(1/8)(8^x) what is f(3)? A. 1/512 B. 1/64 C. 512 D. 64

Answer 1

Answer:

D. 64

Step-by-step explanation:

To evaluate the equation you just have to put the value given into the equation.

The equation given is:

f(x)=($\frac{1}{8}$)($8^{x}$)

So to evaluate f(3) you just put the 3 in the value of x

f(x)=($\frac{1}{8}$)($8^{3}$)

This would be equal to:

f(x)=($\frac{1}{8}$)(512)

Once you do the mutiplication you get:

f(x)=($\frac{512}{8}$)

And the answer would be:

f(x)=64

Answer 2

Hi there!

Let's solve this problem step by step!
$f(x) = \frac{1}{8} (8 {}^{x})$

To find f(3) we must substitute x = 3 into the formula.
$f(3) = \frac{1}{8} (8 {}^{3} )$

Now we use PEMDAS (Parenthesis, exponents, multiply, divide, add, subtract) to find our answer.

Work out the exponents inside the parenthesis first.
$f(3) = \frac{1}{8} \times 512$

And finally multiply.
$f(3) = \frac{1}{8} \times \frac{512}{1} = \frac{512}{8} = 64$

Hence, the answer is D. 64.
~ Hope this helps you!