jika y =2x-1 / x+1 maka dy/dx adalah

y = (2x - 1)/(x + 1)
u = x + 1 → u' = 1
v=2x - 1 → v' = 2
dy/dx = (u'v - v'u)/v²
= (1(x + 1) - 2(2x - 1))/(x + 1)²
= (x + 1 - 4x + 2)/(x + 1)²
= (3 - 3x)/(x + 1)²