The projection of hati+hatj+hatk on the ...

The projection of `hati+hatj+hatk` on the whole equation is `vecr=(3+lamda)hati+(2lamda-1)hatj+3lamda hatk, lamda` being the scalar parameter is:

A

`3/(sqrt(11))`

B

`6/(sqrt(14))`

C

`6/(sqrt(11))`

D

`3/(sqrt(14))`

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