def f(x):
    return (x - 1)**2 + 3

#forover differans
def dfdx(x, h):
    deriverte = (f(x + h) - f(x))/h
    return deriverte 

dx = 0.001
x_koor = 2.0

f_derivert = dfdx(x_koor, dx)
print('f_derivert =', round(f_derivert, 3))