F (x) = 4^x-1; find f (3)

f (3) = 16

Step-by-step explanation:

This question asks us to find f (3). We have to find what f (x), or y is, when x is equal to 3.

f (x) = 4^x-1

Substitute 3 in for x.

f (3) = 4^3-1

First, subtract what is in the exponents.

f (3) = 4^2

4^2 is the same as multiplying 4, 2 times.

4^2=4*4=16

f (3) = 16

f (3) = 63

Step-by-step explanation:

f (x) = 4^x-1;

Let x = 3

f (3) = 4^3 - 1

= 64-1

=63