السؤال
الحل
5 3 3 2 ⋅ x y = 4 0
| C _ | = 5 3 3 2 = 10 − 9 = 1 A _ − 1 = 1 1 2 − 3 − 3 5 = 2 − 3 − 3 5 2 − 3 − 3 5 ⋅ 5 3 3 2 ⋅ x y = 2 − 3 − 3 5 ⋅ 4 0 1 0 0 1 ⋅ x y = 8 − 12 x = 8 y = − 12
7432
7432=14−12=2A_−1=1(7)(2)−(3)(4)2−4−37=122−4−37=1−2−3272
25−5−13
25−5−13=(2)(−13)−(−5)(5)=−1A_−1=1−1−13−552=135−5−2
6−3−84
6−3−84=24−(24)=0
لا يوجد نظير ضربي.
5332⋅xy=40
|C_|=5332=10−9=1A_−1=112−3−35=2−3−352−3−35⋅5332⋅xy=2−3−35⋅401001⋅xy=8−12x=8y=−12
3−112⋅ab=54
A_−1=1(3)(2)−(1)(−1)21−13=1721−13=2717−17372717−1737⋅3−112⋅ab=2717−1737⋅541001⋅ab=21
a=2b=1
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