In a triangle `DeltaOAC`, if `B` is the mid point of side `AC` and ` vec (O A)= vec a ,\ vec (O B)= vec b ,\ ` then what is ` vec (O C) ?`

Explanation

Given,


In `DeltaOAC`,


` vec (O A)= vec a ,\ vec (O B)= vec b`


`B` is the mid point


`Position \ \ \ vec B= (Position \ \ \ vec A+Position \ \ \ vec C)/(2)`


`vec b=( vec (OC)+ vec a)/(2)`


`2vec b=vec a +vec (OC)`


`vec (OC)=2vec b - vec a`