sat suite question viewer
Advanced Math
/ Nonlinear functions
Difficulty: Easy
The function is defined by . What is the value of ?
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Explanation
Choice B is correct. The value of is the value of when . It's given that the function is defined by . Substituting for in this equation yields . Since the positive square root of is , it follows that this equation can be rewritten as , or . Therefore, the value of is .
Choice A is incorrect and may result from conceptual or calculation errors.
Choice C is incorrect. This is the value of , not .
Choice D is incorrect. This is the value of , not .