完成作业X

test2.py

@@ -0,0 +1,11 @@
+A = [3, 4]
+B = [1, 2]
+A_plus_B = [A[i] + B[i] for i in range(len(A))]
+print("1. A + B =", A_plus_B)
+two_mul_A = [2 * x for x in A]
+print("2. 2 * A =", two_mul_A)
+import math
+def vector_norm(v):
+    return math.sqrt(sum(x ** 2 for x in v))
+A_norm = vector_norm(A)
+print("3. A 的模 =", A_norm)