Question

F(x) = 4^x-1; find f(3)​

Answer 1

f(3)=16

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

Answer 2

f(3) = 63

Explanation:

f(x) = 4^x-1;

Let x =3

f(3) = 4^3 -1

= 64-1

=63