Hello dear mathematics enthusiasts,
last week, we saw general ellipse equation in the maths lesson.
Also an equation like $cx^{2}+dy^{2} = r^{2}$ is also usable, where equation forms like this.
Shortened Equation Declaration here.
Then I figured out that, $c$ is two times derivative of $-\ln a.$
Proof $c$ is two times derivative of $-\ln a$
What I want to understand is, how can we draw ellipses using linear functions and their derivatives.
Sorry for misunderstood, 4th-grade senior high school student.