+
৪. A = 3 –4j + 2k এবং B = 6i + 2 – 3k হলে, A x B
এর জন্য নিচের কোনটি সঠিক?
[কু, বাে, '১৫]
ক. 18i + 21j + 30k খ. 8i + 21j + 18k
গ. 8i + 3j + 30k ঘ. 8i + 21j + 30k
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