function

x3+y3−axy=0

y=tx

y=at2/t3+1

Δy/Δt=2at−at4/(t3+1)2

t→2 y→2a/2√2+1

θ→90°  x→0

x=at/t3+1

Δx/Δt=2at−2at3/(t3+1)2

t→1 x→a/2

θ→90°  x→0

 

     T.theodor       2022.11.22.