Now try \( x = 2 \): \( f(2) = (8 - 6)/(4 + 1) = 2/5 = 0.4 \), \( f(0.4) = (0.064 - 1.2)/(0.16 + 1) = (-1.136)/1.16 pprox -0.98 \), close to 1, not 2.