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सिद्ध कीजिए कि वह त्रिभुज जिसके शीर्ष...

सिद्ध कीजिए कि वह त्रिभुज जिसके शीर्षों के स्थिति सदिश क्रमश : `hati + 2hatj + 3hatk, 2hati + 3hatj + hatk" और " 3hati + hatj + 2hatk` है , एक समबाहु त्रिभुज है ।

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यदि A (-hati + 3hatj + 2hatk) , B (-4hati + 2hatj - 2hatk) तथा C(5hati + (lambda +1)hatj + mu hatk) संरेखीय है तब :

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