Mathematics
Senior High
第二小題
考的觀念是什麼
要怎麼運用
12 設矩陣 A =
(1)求 4²-44。
-1
1
2
2 3
=I
6
1
。
41/1-410
1-47
(2)已知A=a+bI,求實數a,b的值。
(1)
2
2
>(t+x)(3x)-4=
$3-4x+x-4=
⇒x=-4x-10 MA
A = 4A •I=0 =>
[2][3]
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