1.

Let x= hat(i)+hat(j) and y=3 hat(i)-2 hat(k). Then, the vector r of magnitude sqrt(21) satisfying r xx x =y xx x and r xx y=x xx y, is

Answer»

`-hat(i)+4hat(J)-2 hat(k)`
`-hat(i)-4 hat(j)-2 hat(k)`
`4 hat(i)+hat(j)-2 hat(k)`
`4 hat(i)-hat(j)-2 hat(k)`

ANSWER :C


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