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TRNG I HC CNG NGHIP TP HCM
Khoa Khoa Hc C Bn
THI CUI K MN PHNG PHP TNH
Lp:DHCQ HOC LAI Ngy thi:
Thi gian: 60 pht :
Cu 1. Gii h phng trnh sau bng phng php Seidel (lp ba bc, bc ba c nh
gi sai s)
40 41
25 26
3 20 4
x y z
x y z
x y z
Cu 2. tui trung bnh ln u kt hn ca ph n Nht Bn t nm 1950 ti nm
2000 c cho bi bng s liu sau:
t f t t f t
1950 23,0 1980 25,2
1955 23,8 1985 25,5
1960 24,4 1990 25,9
1965 24,5 1995 26,3
1970 24,2 2000 27,0
1975 24,7
S dng phng php bnh phng b nht, xc nh ,a b ng thng y at b l
xp x tt nht bng gi tr trn. Vi kt qu tm c, hy d on tui kt hn ln
u ca ph n Nht vo nm 2005.
Cu 3. Hm Fresnel 2
0
sin2
x tS x dt
xut hin ln u trong l thuyt v nhiu x
nh sng ca nh ton hc ngi Php Augustin Fresnel (1788-1827). Gn y, hm
Fresnel xut hin trong cc cng trnh thit k ng quc l. Bng cch s dng cng
thc Simpson 1/3 vi s on chia 10n , cc bn hy tnh gn ng 1S .
Cu 4. Gii phng trnh vi phn Cauchy:
3 3, 0;0,02
0 1
y x y x
y
bng phng php Euler ci tin, ci tin 3 bc vi 0,01h .
B mn Ging vin ra