result of: j=0 indicates x too small j=100 indicates x too large locate j xx(j) xx(j+1) -90.0000 0 lower lim -72.948730 -80.0000 0 lower lim -72.948730 -70.0000 27 -70.142578 -69.944801 -60.0000 52 -60.536263 -59.845963 -50.0000 63 -50.663937 -49.467468 -40.0000 70 -40.884548 -39.186684 -30.0000 75 -31.478918 -29.298815 -20.0000 79 -22.064632 -19.401850 -10.0000 83 -10.566000 -7.313669 0.0000 86 -0.300206 3.478463 10.0000 88 7.450869 11.626944 20.0000 90 16.017132 20.632408 30.0000 92 25.484316 30.584986 40.0000 94 35.947174 41.584286 50.0000 96 47.510418 53.740391 60.0000 97 53.740391 60.289780 70.0000 99 67.174965 74.413162 80.0000 100 74.413162 upper lim 90.0000 100 74.413162 upper lim