Which of the following options is an equivalent function to f(x) = 4(3)2x? select one: a. f(x) = 36x b. f(x) = 4(9)x c. f(x) = 144x d. f(x) = 4(6x) incorrect

The correct answer is:  [B]:  " f(x) = 4(9)ˣ" .

Note: 

Given:  "f(x) = 4* (3²)ˣ  '

Note that:  "(3²) = "(3*3) = 9;

So;  "4* (3²)ˣ " = 4*(9)ˣ ;

which is:  Answer choice:  [B]:  " f(x) = 4(9)ˣ " .