Question: Write code for a function named formula, that takes an integer x and returns an integer. The function must use recursion to calculate the return

Write code for a function named formula, that takes an integer x and returns an integer. The function must use recursion to calculate the return value as follows:

For all x >= 0, formula(0) is 4, where x is 0. (base case) formula(x) is 2x + formula(x-1) where x > 0. (recursive case)

Do not write any code to get input or show output.

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