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anonymous

  • one year ago

find the value of 5 1 4 2

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  1. FireKat97
    • one year ago
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    are you meant to find the determinant of the matrix 5 1 4 2 ???

  2. anonymous
    • one year ago
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    yes

  3. FireKat97
    • one year ago
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    okay so to find the determinant of a 2 x 2 matrix, you do... |dw:1443686132265:dw| (1) - (2) where (1) is the product of 5 and 2 and (2) is the product of 1 and 4

  4. FireKat97
    • one year ago
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    so try solving that and tell me what you get

  5. anonymous
    • one year ago
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    i got 38

  6. anonymous
    • one year ago
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    @FireKat97

  7. FireKat97
    • one year ago
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    Not quite, so (1) = product of 5 and 2, so (1) = 5 x 2 = ? (2) = product of 1 and 4, so (2) = 1 x 4 = ? and determinant = (1) - (2) so determinant = (5 x 2) - (1 x 4) = ?? so now try again

  8. anonymous
    • one year ago
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    6

  9. FireKat97
    • one year ago
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    Yup! Thats correct :)

  10. anonymous
    • one year ago
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    thats the value?

  11. FireKat97
    • one year ago
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    yup thats the determinant..

  12. FireKat97
    • one year ago
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    wait, the question was asking for the determinant right?

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