turunan pertama dari Y = x-1/x^2+2

u = x - 1
u' = 1

v = x² + 2
v' = 2x

y = u/v
y' = (u'v - uv')/v²
y' = (x² + 2 - (x - 1)(2x)) / (x² + 2)²
y' = (-x² + 2x + 2) / (x² + 2)²