Find the equation to the straight line which bisects the distance between the points `(a , b),\ (a^(prime), b ')` and also bisects the distance between the points `(-a , b)a n d\ (a^(prime),-b^(prime))dot`

Explanation

The points which bisects the given points are `(x
_1
​
,y
_1
​
)=(
frac{a+a'}{2} ,
...