OG详解-OG1 数学2 Q24

Choice C is correct. For the form of the function in choice C,  f(x)= 128 (1.6)^x-1, the value of f(1) can be found as 128 (1.6)^1-1, which is equivalent to 128(1.6)⁰, or 128. Therefore, k = 128, which is shown in f(x)= 128 (1.6)^x-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.