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Q)

If the vectors $\overrightarrow{a} = ( 1, x, -2)$ and $\overrightarrow{b} = (x, 3, -4)$ are mutually perpendicular, then is :


( A ) $-4$
( B ) $2$
( C ) $-2$
( D ) $4$

1 Answer

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A)
answer is option (C)
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