1.

If a vector \[2\hat{i}+3\hat{j}+8\hat{k}\]is perpendicular to the vector \[4\hat{j}-4\hat{i}+\alpha \hat{k}\]. Then the value of \[\alpha \] is           [CBSE PMT 2005]

A.                 ?1          
B.                 \[\frac{1}{2}\]
C.                 \[-\frac{1}{2}\] 
D.                 1
Answer» D.                 1


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