Question

What vector must be added to the two vectors î - 2j + 2k and
2i+j-k, so that the resultant may be a unit vector along
x-axis.
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Answer 1

Answer:

1st VECTOR => i - 2j + 2k

2nd VECTOR => 2i + j - k

RESULTANT => 3 i - j + k

But ; Required RESULTANT => i

So , Added Vector => i - ( 3i - j + k )

=> i - 3i + j - k

=> -2i + j - k