So I have this:
which, in case and are positive, may be graphed like:
It seems plotting and should be essentially the same.
However, my real problem is when I try to get out of those equations.
*Unfortunately first pictures showing my thorough work had to be removed because of some reader-disruptive flaws.*
Essence of derivation of equation #1:
Essence of derivation of equation #2:
Why is there a big difference?