1.

If vec(a) = 2 hat(i) - hat(j) + hat(k) and vec(b) = hat(i) - 2 hat(j) + hat(k)then projection of vec(b)'on ' vec(a) is

Answer»

`(5 SQRT(6))/(3)`
`(5)/(sqrt(6))`
`(5)/(sqrt(6))`
`5 sqrt(6)`

ANSWER :B


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