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यदि सदिश `vec(AB)=3hati+4hatk` तथा `vec(AC)=5hati-2hatj+4hatk` त्रिभुज की भुजाओं को प्रदर्शित करते है, तब A पर माध्यिका की लम्बाई-

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यदि सदिश `vec(AB)=3hati+4hatk` तथा `vec(AC)=5hati-2hatj+4hatk` त्रिभुज की भुजाओं को प्रदर्शित करते है, तब A पर माध्यिका की लम्बाई-
A. `2sqrt(7)`
B. `3sqrt(2)`
C. `sqrt(14)`
D. इनमे से कोई नहीं
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Correct Answer - b
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