y   =   ln ( x/m – s a )  /  r²

    y r²  =   ln ( x/m – s a )

    eyr²  =   x/m – s a

m eyr²  =   x – m s a

m erry  =   x – m a s

 

Cheers Rolf

PS: Not my creation : )

In reply to simple as math by LanX

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