[HELP] - FORTRAN

[Long Nguyen Thanh <lnguyen@sgh.waw.pl>]

hiall!
	To^i co' mo^.t va^'n dde^` na`y xin ho?i ca'c tho^ng
thao. ve^` la^.p tri`nh tre^n Fortran.
	To^i pha?i gia?i quye^'t mo^.t va^'n dde^` ba(`ng
phu*p*ng pha'p Newton-Raphson, to^i co' la^.p mo^.t chu*O*ng
tri`nh tr^n Fortran ve^` va^'n dde^` na`y nhu*ng kho^ng hie^?u
ta.i sao khi cho du*~ lie^.u va`o ma'y dde^`u tra? lo*`i:
run-time error M6103
floating-point error: divide by zero.
	To^i dda~ kie^?m tra la.i: algorithm,  gia? thie^'t
double precision ma`
cu~ng kho^ng ddu*o*,c, ca'c functions exteranal to^i dde^`u dda~
test va` kho^ng co' va^'n dde^` gi`. 
	MOng ca'c anh chuye^n nghie^.p co' the^? chi? cho to^i,
error na`y co' the^?  xua^'t pha't tu*` dda^u? va` ba(`ng ca'ch
na`o co' the^? overcome it ddu*o*.c?
XIn ca?m o*n
Tha^n
NTL