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Advanced Math / Nonlinear functions Difficulty: Hard

For the exponential function f , the value of f1 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?

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Explanation

Choice C is correct. For the form of the function in choice C, fx=1281.6x-1, the value of f1 can be found as 1281.61-1, which is equivalent to 1281.60, or 128 . Therefore, k = 128 , which is shown in fx=1281.6x-1 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.