Hello Candidate,

The harmonic conjugate of (4,-2) with respect to (2,-4) and (7,1) is equal to (-8,-14). Because of a limitation of the number of answering modes available on this platform is not possible for me to deduce the whole expression here for you but I can help you with the steps which you should follow in order to get the solution- Assume a imaginary point (h,k) such that the point has to be such that the distance between the points are in harmonic progression and solve it accordingly.

Hope you found it helpful. If you have any further queries feel free to post it here!!