compute-f16-for-fxx-and-explain-why-this-input-is-allowed

Question

Compute f(16)f(16) for f(x)=xf(x)=\sqrt{x} and explain why this input is allowed.

Accepted Answer

f(16)=4f(16) = 4, because 1616 is a nonnegative real number and is in the domain of the square root function

Answer

f(16)=−4f(16) = −4, because both positive and negative numbers square to 1616

Answer

f(16)=±4f(16)=\pm4, because square roots always produce two values

Answer

f(16)f(16) is undefined, because 1616 is not in the domain of the square root function

Compute f(16)f(16) for f(x)=xf(x)=\(\sqrt{x}\) and explain why this input is allowed.