0.2
-1
0.4
-0.5
x1 = 0.4000000000000002 y1 = -0.4999999999999995
x2 = 0.200000000000000 y2 = -0.9999999999999999
x3 = 0.400000000000000 y3 = -0.5000000000000001
x4 = 0.1999999999992839 y4 = -1.00000000000179
x5 = 0.4000000000001381 y5 = -0.4999999999996548
x6 = 0.200000000000000 y6 = -1.00000000000000
x7 = 0.199999999999989 y7 = -1.000000000000027