Python:实现sum of arithmetic series算术级数之和算法
# DarkCoder
def sum_of_series(first_term, common_diff, num_of_terms):
sum = (num_of_terms / 2) * (2
# DarkCoder
def sum_of_series(first_term, common_diff, num_of_terms):
sum = (num_of_terms / 2) * (2