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The cost of a ride in a taxi is $4 for the first half-mile plus a constant amount per half-mile after that. The sequence below shows the pattern of numbers that appear on the driver's screen.
4, 4.50, 5, 5.50, 6, ...
Write a Recursive Function that can be used to determine f(x), the cost in dollars, for a ride in the taxi of, x, half-miles.
