Re: [線代] 線代小問題
: 請大家幫個忙謝囉～
賺點P幣 這考高斯消去法
[ 1 -1|b_1]
[ 3 1|b_2]
[ 1 7|b_3]
[ 2 4|b_4]
[ 1 -1|b_1 ] [ 1 -1| b_1 ]
=[ 0 4|b_2-3b_1] = [ 0 1|(b_2-3b_1)/4]
[ 0 8|b_3- b_1] [ 0 8| b_3- b_1 ]
[ 0 6|b_4-2b-1] [ 0 6| b_4-2b-1 ]
[ 1 0|(b_2+ b_1)/4 ]
=[ 0 1|(b_2-3b_1)/4 ]
[ 0 0| b_3-2b_2+5b_1 ]
[ 0 0| b_4-(3/2)b_2+(5/2)b_1]
{b_3-2b_2+5b_1=0
{b_4-(3/2)b_2+(5/2)b_1=0
=>{b_3 = 2b_2-5b_1
{2b_4 = 3b_2-5b_1_
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01/10 13:18, , 1F
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01/10 15:13, , 2F
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