XII Vectors For any vector a, show that i × (a×i) + j × (a×j) + k × (a×k) = 2a

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For any vector a, show that i × (a×i) + j × (a×j) + k × (a×k) = 2a

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Mame please solve this problem

Prove that the necessary and sufficient condition for the vectors a, b, c are coplanar is that a.(b*c)=0

mohammadowais
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Madm ak board lelo bahot sa likh rehe ho samj ni araa

Ankitpahalwan