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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)
25 26
20 21
3 10 4
x y z
x y z
x y z
Cu 2. Bng s liu sau y cho ta bit s dn nc M (triu ngi) trong khong thi
gian t nm 1900 ti nm 2000:
t f t t f t
1900 76 1960 179
1910 92 1970 203
1920 106 1980 227
1930 123 1990 250
1940 131 2000 275
1950 150
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 dn s nc M vo
nm 2010.
Cu 3. Error function (hm li) 2
0
2 x tE x e dt
c nhiu ng dng trong xc sut,
thng k v k thut. Bng cch s dng cng thc Simpson 1/3 vi s on chia
10n , cc bn hy tnh gn ng 1E .
Cu 4. Gii phng trnh vi phn Cauchy
2 23 , 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