Question

If O is origin and C is the mid point of $A(2, - 1)$ and $B( - 4,3)$. Then value of $\overset{\rightarrow}{OC}$ is

• A. i + j
• B. i – j
• C. – i + j
• D. – i – j

Answer 1

Answer: (C)

– i + j

Answer 2

Co-ordinate of C is $\left( \frac{2 - 4}{2},\frac{- 1 + 3}{2} \right) = ( - 1,1)$

$\therefore\overset{\rightarrow}{OC} = - \mathbf{i} + \mathbf{j}$.