Question

When f(×)=-4(1/2)^-x, what is f(2)​

Answer 1

16

Explanation:

Given expression:

f(x) = 4
`((1)/(2) )^(-x)`

Now we are to find f(2);

To find f(2) we are to substitute 2 for any place where we find x;

f(2) = 4
`((1)/(2) )^(-2)`

f(2) = 4 x
`(1)/(((1)/(2))^(2) )`

f(2) = 4 x
`(1)/((1)/(4) )`

f(2) = 4 x 4 = 16