python作業之scipy

題目： 1：`import numpy as np A = np.random.randint(-20, 20, size = 30 * 20).reshape(30, 20) b = np.random.randint(-20, 20, size = 30 * 1).reshape(30, 1) x = np.dot(np.dot(np.linalg.inv(np.dot(A.T, A)), A

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