



'''simple docstring'''






from math import exp


def 			snake_case_					( _lowerCAmelCase  :						float  )				->       float:
							return 8 * x - 2 * exp(-x  )


def 			snake_case_					( _lowerCAmelCase  :						float       ,				_lowerCAmelCase  :						float       ,				_lowerCAmelCase  :						int  )				->       float:
							UpperCAmelCase			:	Optional[Any]										=		lower_bound
							UpperCAmelCase			:	List[Any]										=		upper_bound
							for _ in range(0       ,				_lowerCAmelCase  ):
														UpperCAmelCase							,		UpperCAmelCase			:	Union[str, Any]										=		xa, xa - (f(_lowerCAmelCase  ) * (xa - xa)) / (f(_lowerCAmelCase  ) - f(_lowerCAmelCase  ))
							return xa


if __name__ == "__main__":
						print(F"Example: {secant_method(1, 3, 2)}")










'''simple docstring'''






from __future__ import annotations


def 			snake_case_					( _lowerCAmelCase  :						list[int]       ,				_lowerCAmelCase  :						int  )				->       list[int]:
							UpperCAmelCase			:	dict[int, int]										=		{}
							for index, val in enumerate(_lowerCAmelCase  ):
														UpperCAmelCase			:	Tuple										=		target - val
														if compl in chk_map:
																					return [chk_map[compl], index]
														UpperCAmelCase			:	Any										=		index
							return []


if __name__ == "__main__":
						import doctest

						doctest.testmod()
						print(F"{two_sum([2, 7, 11, 15], 9) = }")





