If \[\mathbf{a}=2\mathbf{i}+\mathbf{k},\,\,\mathbf{b}=\mathbf{i}+\mathbf{j}+\mathbf{k}\] and \[\mathbf{c}=4\mathbf{i}-3\mathbf{j}+7\mathbf{k}.\] If \[\mathbf{d}\times \mathbf{b}=\mathbf{c}\times \mathbf{b}\] and \[\mathbf{d}\,.\,\mathbf{a}=0,\] then d will be [IIT 1990]

\[\mathbf{i}+8\mathbf{j}+2\mathbf{k}\]

\[\mathbf{i}-8\mathbf{j}+2\mathbf{k}\]

\[-\mathbf{i}+8\mathbf{j}-\mathbf{k}\]

\[-\mathbf{i}-8\mathbf{j}+2\mathbf{k}\]

If \[\mathbf{a}=2\mathbf{i}+\mathbf{k},\,\,\mathbf{b}=\mathbf{i}+\math

1.	If \[\mathbf{a}=2\mathbf{i}+\mathbf{k},\,\,\mathbf{b}=\mathbf{i}+\mathbf{j}+\mathbf{k}\] and \[\mathbf{c}=4\mathbf{i}-3\mathbf{j}+7\mathbf{k}.\] If \[\mathbf{d}\times \mathbf{b}=\mathbf{c}\times \mathbf{b}\] and \[\mathbf{d}\,.\,\mathbf{a}=0,\] then d will be [IIT 1990]
A.	\[\mathbf{i}+8\mathbf{j}+2\mathbf{k}\]
B.	\[\mathbf{i}-8\mathbf{j}+2\mathbf{k}\]
C.	\[-\mathbf{i}+8\mathbf{j}-\mathbf{k}\]
D.	\[-\mathbf{i}-8\mathbf{j}+2\mathbf{k}\]
Answer» E.

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