A function returns a number x cubed. What should be the input to the function?

In this context, the function is designed to cube a number, meaning it takes a single number as input and produces the result of that number raised to the power of three. The mathematical operation involved can be represented as ( f(x) = x^3 ).

When considering the options for inputting into the function, the first choice, which is simply 'x', correctly represents the behavior of the function. It requires just one argument—the value you want to cube. For example, if you were to pass the number 3 as 'x', the function would compute ( 3^3 = 27 ).

The other choices involve multiple inputs or a specific number. Inputting 'x, x' suggests two separate values, which is unnecessary for a function that only needs one value. Similarly, providing 'x, x, x' introduces an additional layer of complexity with three inputs, which the function is not designed to handle. Lastly, using the number '27' as input does not align with the functional design either, because while that value is indeed the result of cubing 3, it does not fulfill the requirement of taking an input to compute a cube; instead, it would be the output when certain input is provided. Thus