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माना सदिश u, v और w इस प्रकार हैं कि u+c...

माना सदिश u, v और w इस प्रकार हैं कि `u+c+w=0`, यदि `|u|=3, |v|=4` और `|w|=5` हों , तो `u*v+v*w+w*u` है

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