|6216|
|211112320110|
|−32−1−6|
|310110−120320|
Correct answer is D
A=|3−216|
|A| = (3 x 6) - (-2 x 1)
= 18 + 2
= 20.
A−1 = 120|62−13|
= |620220−120320|
= |310110−120320|
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