- - - -_defined_by - - -_=_8x -_._For_what - ~ The function f is f x = 72 value of x does f x?
Correct answer: B (parsed from the explanation — this source omits an answer key for this item)
Explanation
72 72=8 Choice B is correct. Substituting for f^xh in the given function yields x. = =72 Dividing each side of this equation by 8 yields 9 x. Therefore, f^xh when the value of x is 9. =64 =72 Choice A is incorrect. This is the value of x for which f^xh , not f^xh . =512 =72 Choice C is incorrect. This is the value of x for which f^xh , not f^xh . =640 =72 Choice D is incorrect. This is the value of x for which f^xh , not f^xh .
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