bracketing values: function values: x1 x2 bessj0(x1) bessj0(x2) 1.00 3.60 0.765198 -0.391769 2.00 3.00 0.223891 -0.260052 1.40 4.00 0.566855 -0.397150 4.00 6.60 -0.397150 0.274043 5.00 6.00 -0.177597 0.150645 4.40 7.00 -0.342257 0.300079 7.00 9.60 0.300079 -0.208979 8.00 9.00 0.171651 -0.090334 7.40 10.00 0.278596 -0.245936 10.00 12.60 -0.245936 0.162607