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तीन बिन्दुओं A, B व C के स्थिति सदिश क्र...

तीन बिन्दुओं A, B व C के स्थिति सदिश क्रमशः `hati + hatj , hati - hatj` व `l hati + m hatj + nhatk` हैं। बिन्दु समरेखीय होंगे, यदि

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