About the relations between primary axes of confocals of an ellipsoide?

In the book COORDINATE GEOMETRY of THREE DIMENSIONS' (1937) of Robert J.T. Bell there is a statement (EX.1. p. 178) that the primary semi-axes a[1], a[2] and a[3] of the confocals of x^2/a^2 +...

03 April 2024 8,939 0 View