Question #N116
The function \(f\) is defined by \(f(x) = \sqrt{x^2 + 1}\). What is the value of \(f(-3)\)?
A. -2
B. 2
C. $\sqrt{10}$
D. 10
Correct Answer is: C
Substituting -3 for x in the equation f(x) = √(x^2 + 1) yields f(-3) = √((-3)^2 + 1). Simplifying, we get f(-3) = √(9 + 1) = √10.