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दिए हुए सदिशों vec(a) = 2hat(i) - hat(j)...

दिए हुए सदिशों `vec(a) = 2hat(i) - hat(j) + 2hat(k)` और `vec(b) =-hat(i) +hat(j) - hat(k)` के लिए सदिश `vec(a) +vec(b)` के अनुदिश मात्रक सदिश ज्ञात कीजिए।

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