f(x)= x^2-2.7x+1.8 i a b 1 0.000000 2 1.000000
r2= 1.5 r f(a) f( r ) 2.000000 1.000000 1.800000 0.100000 2.000000 1.500000 0.100000 0.000000
r1 = 1.2 i
a 1 2 3 4 5 6 7 8 9
b 0.000000 0.650000 0.975000 1.137500 1.137500 1.178125 1.198438 1.198438 1.198438
r 1.300000 1.300000 1.300000 1.300000 1.218750 1.218750 1.218750 1.208594 1.203516
f(a) 0.650000 0.975000 1.137500 1.218750 1.178125 1.198438 1.208594 1.203516 1.200977
f( r ) 1.800000 0.467500 0.118125 0.022656 0.022656 0.007041 0.000471 0.000471 0.000471
0.467500 0.118125 0.022656 -0.005273 0.007041 0.000471 -0.002504 -0.001042 -0.000292