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Question
Let A = `[(200, 50),(10, 2)]` and B = `[(50, 40),(2, 3)]`, then |AB| is equal to ______.
Options
460
2000
3000
–7000
MCQ
Fill in the Blanks
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Solution
Let A = `[(200, 50),(10, 2)]` and B = `[(50, 40),(2, 3)]`, then |AB| is equal to –7000.
Explanation:
A = `[(200, 50),(10, 2)]`
B = `[(50, 40),(2, 3)]`
AB = `[(200, 50),(10, 2)][(50, 40),(2, 3)]`
= `[(10000 + 100, 8000 + 150),(500 + 4, 400 + 6)]`
AB = `[(10100, 8150),(504, 406)]`
|AB| = (10100)(406) – (504)(8150)
= 4100600 – 4107600
= –7000
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