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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2005
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Q)

If a vector $2\hat{i} + 3\hat{j}+8\hat{k}$ is perpendicular to the vector 4j- 4i + ak , then the value of ?


( A ) ${1}$
( B ) ${-1}$
( C ) $\frac{1}{2}$
( D ) $\frac{-1}{2}$

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