jika f(1/2x)= x^2/x-1 maka f(x) adalah

jawab

f(1/2 x) = (x² )/ ( x- 1)
1/2 x = y →  x = 2y

f(1/2 x ) = (x² ) / (x - 1)
f(y) = (2y)²/ (2y - 1)
f(x) = (4x²) / (2x - 1)