Question:

The dot product of a vector with the vectors i+ j-3 k, i+3 j-2 k, 2 i+ j+4 k are 0,5 and 8 respectively. The vector is

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Test options directly when dot products are specified.

Updated On: Mar 19, 2026

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Let a=(1,2,1). a·(1,1,-3)=1+2-3=0 a·(1,3,-2)=1+6-2=5 a·(2,1,4)=2+2+4=8 Hence, the vector is i+2 j+ k.

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