Jika A =( 3 4 ) dan B = ( 2 -5 ) ︎ ︎︎ ︎ ( 2 5 ) ( -1 3), nilai AB-¹ = ​

Jawaban:

AB-¹=(13 23, 11 20)

Penjelasan dengan langkah-langkah:

A=( 3 4, 2 5) , B=(2 -5, -1 3)

AB-¹=

*B-¹= 1/det B. adj B

B-¹= 1/6-5. ( 3 5, 1 2)

B-¹= ( 3 2, 1 2)

*AB-¹= ( 3 4, 2 5).( 3 5, 1 2)

AB-¹= ( 3(3)+4(1) 3(5)+4(2) )

( 2(3)35(1) 2(5)+5(2) )

AB-1= ( 9+4 15+8 )

( 6+5 10+10 )

AB-¹= ( 13 12, 11 20)

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