大学线性代数讲义前面有对知识的讲解,后面是习题。便于理解。不想挂科的同学们的必备之物
2).¢ , §;
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ùn«Ä)'g I ª¦ ¤^'g Ä)þ Ó.Ïd· ¡ù g Ð1g .e¡· 5y² §|£VI¤Q²vÐ1g & '5 §| ¦ §|k Ó'A.w,Xt¦^2),3)«Ð1g ,§ 'A´ Ó'.´y¦^1)Ð1g & '5 §| ¦ §|(VI)'A´ Ó'( ¡¬y²). Ò´`^ £{A §|´ (' {.· Pw §|(VI):ò§'XêÚ~ê ü¤XeGª
a11a21a31···an1
a12a22a32···an2
···a1nb1···a2nb2···a3nb3············annbn
ù«ÝG®² û½ §|(VI),Ïd· § AÏ'¶¡µÝ ,P
a11a12···a1n a 21a22···a2n
A= .· ò
············
an1an2···ann
¯= A
a11a21···an1
a12a22···an2
···a1nb1
···a2nb2
······
···annbn
¡ (VI)'yPÝ .Ù¢é(VI)cIÐ1g Ò´éÙyPÝ cIÐ1g ,Ïd· ' £{ ±QÝ ¥cI.~Xþ¡'~f [ ±^Ý 'Gª Ñ@t .
2x1 x2+3x3=1
~.¦A4x1 2x2+5x3=4
2x1 x2+4x3= 1 2 1312 1312 131
A.ÙyPÝ 4 254 → 00 12 → 001 2
2 14 1001 20000
1
2x1 x2+3x3=1x1=(7+x2)
& §|, & .
x3= 2x3= 2
x2´gd þ.( ù«¹kgd þ'A,¿ §|'?¿AÑUd§v«,ù«A& ¡ ÏA,½ö A.)
2x1+x2 2x3+3x4=1
~.¦A3x1+2x2 x3+2x4=4
3x1+3x2+3x3 3x4=5