Question

in python

def matrixMultiplication(matrix, vector):
    """Return the product of a matrix and a vector

    Arguments:
        matrix: A list of lists representing an nxn matrix
        vector: A list representing an nx1 matrix

    Returns:
        A list representing the nx1 matrix obtained by multiplying the input
        matrix by the input vector.

    >>> matrix = [[1, 2, 3], [2, 3, 1], [4, 1, 2]]
    >>> vector = [1, 2, 3]
    >>> matrixMultiplication(matrix, vector)
    [14, 11, 11]
    """

Answer 1

def matrixMultiplication(matrix, vector):
    """Return the product of a matrix and a vector

    Arguments:
        matrix: A list of lists representing an nxn matrix
        vector: A list representing an nx1 matrix

    Returns:
        A list representing the nx1 matrix obtained by multiplying the input
        matrix by the input vector.

    >>> matrix = [[1, 2, 3], [2, 3, 1], [4, 1, 2]]
    >>> vector = [1, 2, 3]
    >>> matrixMultiplication(matrix, vector)
    [14, 11, 11]
    """
    lst = []
    for i in range(len(matrix)):
        total = 0
        for k in range(len(vector)):
            total += matrix[i][k] * vector[k]
        lst.append(total)
    return lst


matrix = [[1, 2, 3], [2, 3, 1], [4, 1, 2]]
vector = [1, 2, 3]
print(matrixMultiplication(matrix, vector))