OG详解-OG4 数学1 Q16

Choice B is correct. It’s given that the function f (x)= 206(1.034)^x models the value, in dollars, of a certain bank account by the end of each year from 1957 through 1972, where x is the number of years after 1957. It follows that f ( ) represents the estimated value, in dollars, of the bank account x years after 1957. Since the value of f (5) is the value of f (x) when x = 5, it follows that “f (5) is approximately equal to 243” means that f (x ) is approximately equal to 243 when x = 5. In the given context, this means that the value of the bank account is estimated to be approximately 243 dollars 5 years after 1957. Therefore, the best interpretation of the statement “f (5) is approximately equal to 243” in this context is the value of the bank account is estimated to be approximately 243 dollars in 1962.
Choice A is incorrect and may result from conceptual errors. Choice C is incorrect and may result from conceptual errors. Choice D is incorrect and may result from conceptual errors.