$y^2 = (x-1)/ (x+1)$ implicates that derivative is $y'= 1/y(x+1)^2$. But if you eliminate denominator, then one obtains $y' = (1-y^2)/2y(x+1)$. Why is this different?
2026-05-06 02:13:50.1778033630
Why is derivative different
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