diff ( y , x , 2 ) = diff ( y , x , 1 ) ; ! Digits := 32; max_terms := 30; ! x_start := -4.0; x_end := 1.0 ; diff(y,0,exact_soln_y(x_start)); diff(y,1,exact_soln_yp(x_start)); glob_h := 0.00001 ; glob_look_poles := true; glob_max_iter := 10; ! exact_soln_y := proc(x) return(1.0 + exp(x)); end; exact_soln_yp := proc(x) return(exp(x)); end;