AP EAMCET Engineering 20 Apr 2019 Shift 2 Paper

It is given that,
|z−z1|+|z−z2|=k
And
|z1−z2|<k
Sum of the distance of the point z from z1 and z2 is constant (k) and more than the distance between points z1 and z2. Thus, the locus of the point z is an ellipse.