A
B
C
D
Explanation
Correct answer: A.
Choice A is correct. It's given that the function is defined by . Substituting for into the given equation yields , or .
Desmos solution:
Enter in Desmos:
Reviewed and rewritten by CookSAT
Why the other choices are wrong
Choice B
Choice B is incorrect and may result from conceptual or calculation errors.
Choice C
Choice C is incorrect and may result from conceptual or calculation errors.
Choice D
Choice D is incorrect. This is the value of for which , not the value of .