Jika diketahui matriks A=|3 -1| maka A-1 adalah.... |-4 5| A.1/11 |3 -5| |2 4| B.1/11 |2 3| |4 5| C.1/11 |1 2| |3 4| D.1/11 |5 1| |4 3| E.1/11 |1 3| |
Matematika
nafishaainy03
Pertanyaan
Jika diketahui matriks A=|3 -1| maka A-1 adalah....
|-4 5|
A.1/11 |3 -5|
|2 4|
B.1/11 |2 3|
|4 5|
C.1/11 |1 2|
|3 4|
D.1/11 |5 1|
|4 3|
E.1/11 |1 3|
|2 4|
|-4 5|
A.1/11 |3 -5|
|2 4|
B.1/11 |2 3|
|4 5|
C.1/11 |1 2|
|3 4|
D.1/11 |5 1|
|4 3|
E.1/11 |1 3|
|2 4|
1 Jawaban
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1. Jawaban dikisiswanto
A = [3 -1][-4 5]
det A = 15 - 4 = 11
adj A = [5 1][4 3]
A^-1 = 1/detA adj A
A^-1 = 1/11 [5 1][4 3]
Jawaban : D
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