Program must be written in C and don't use a loop

In the last lab (Lab 4), you were given a series like the following and you needed to calculate the value of S(x) by using a simple for loop in C. S(x) = x + (x+1) + (x+2) + (x+3) + (x+4) + ...... ......... + (x + n-1) + (x + n) For this lab, you have to write a program named seriesFunction.c that prompts user to enter two values, x and n. Then it would use a function to compute the sum of the series. It will take two arguments, x and n. It will return the sum of the series. As an example, for input values x = 100 and n = 0, it should output 100. For x = 100 and n = 1, it should output 100 + 101 = 201