If the position vectors of the points `A , B , C ,Da r e2 hat i+4 hat k ,5 hat i+3sqrt(3) hat j+4 hat k ,-2sqrt(3) hat j+ hat ka n d2 hat i+ hat k` respectively, prove that `C D` is parallel to `A Ba n dC D=2/3A Bdot`

Explanation

Correct option is (C).


Fince, we can see that `f(x_{1})=f(x_{2})` for all values of `x_{1}` and `x_{2}`.


`\Rightarrow f(x)` is one-one.


Aso, `f(x)` is onto furction as for every `x`, there is an element


...