Answer to Question #228560 in Python for venkat

Question

Sum of the series

Write a program to find the sum

S of the series where S = x - x^3 + x^5 + ....... upto N terms.Input

The first line of input is an integer

X. The second line of input is an integer N.Explanation

If we take

X value as 2 in the series upto 5 terms.Then the series is 2 - 2³ + 2⁵ - 2⁷ + 2⁹

So, the output should be

410.

Answer 1

def Sum(X, N):
   i = 1
   sum_Series = 0  
   for member in range(N):
      if member % 2 > 0:
         sum_Series += -X**i
         i += 2
      else:
         sum_Series += X**i
         i += 2
   return sum_Series


X = int(input("Enter an interger X: "))
N = int(input("Enter an interger N: "))
print(Sum(X, N))