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यदि बिंदुओं P और Q के स्थिति सदिश क्रमश ...

यदि बिंदुओं P और Q के स्थिति सदिश क्रमश :`hati + 3hatj - 7 hatk" और "5hati - 2hatj + 4hatk` हों , तो रेखाखण्ड PQ की लम्बाई ज्ञात कीजिए ।

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