diff ( y , x , 1 ) = sinh(sqrt(0.1 * x + 0.2)); ! Digits := 32; max_terms := 30; ! x_start := 2.0; x_end := 3.0 ; diff(y,0,exact_soln_y(x_start)); glob_look_poles := true; glob_max_iter := 1000000; glob_max_h := 0.00001; ! exact_soln_y := proc(x) return(20.0 * sqrt(0.1 * x + 0.2) * cosh( sqrt(0.1 * x + 0.2)) - 20.0 * sinh( sqrt(0.1 * x + 0.2))); end;