7/24/2019 TDB1TP1516

1/1

A

1 2 01 1 10 1 2

A

A1

A1 =

3 4 ?2 2 ?1 1 ?

b=

1 1 1

4x1 x2 = 1x1 + 4x2 x3 = 1

x2 + 4x3 = 1

LU

LU

A

A

LU

x=

0 0 0

t

x=

0 0 0

t

TJ TG.S

Ax= b

A

1 2(1 ) 01 2 00 0 1

TJ TG.S