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f(1) For the exponential function f, the value of is k, where k is a constant. Which of the following equivalent forms of the function f shows the value of k as the coefficient or the base? f(x) = 50(1.6)^x^+1
Correct answer: C (parsed from the explanation — this source omits an answer key for this item)
Explanation
=128 1.6 x -1 Choice C is correct. For the form of the function in choice C, f^xh ^ h , 128 1.6 1-1 128 1.6 0 the value of f^1h can be found as ^ h , which is equivalent to ^ h , or 128 =128 =128 1.6 x -1 . Therefore, k , which is shown in f^xh ^ h as the coefficient. Choice A is incorrect and may result from conceptual or calculation errors. Choice B is incorrect and may result from conceptual or calculation errors. Choice D is incorrect and may result from conceptual or calculation errors. 45 SAT PRACTICE TEST #10 ANSWER EXPLANATIONS SAT ANSWER EXPLANATIONS n MATH: MODULE 2
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