Answer: B: (1-5x²)³, all real numbers
Explanation:
The notation
is called function composition, which is where you pass one function in as the value of another function. In other words,
.
Since we have the values for f(x) and g(x), let's plug them in.
Hence, the best answer choice is B, as all real numbers would work and it is the cube of 1 - 5x².