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`lambda` का मान ज्ञात कीजिएः यदि सदिश `vec(a)=hati+3hatj+hatk, vec(b)=2hati-hatj-hatk` एव `vec(c)=lambdahati+7hatj+3hatk` समतलिये है

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`lambda` का मान ज्ञात कीजिएः यदि सदिश `vec(a)=hati+3hatj+hatk, vec(b)=2hati-hatj-hatk` एव `vec(c)=lambdahati+7hatj+3hatk` समतलिये है
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Correct Answer - `lambda=0`
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