Write a C function which takes a positive integer from the user and calculates the sum up to the terms of the following sequence. • The general form of the sequence : an= 3n + 2 • Assume that the input is a natural number. • Design a recursive function. • The program should repeatedly accept an input until the user enters -1. You must satisfy the format presented below. If it is different from the format below, it will be treated incorrectly. You can also write a printf using commented statements.

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