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anonymous

  • 5 years ago

what is the formula to find inverse matrices A..?example 2x2 matrices.. A=[2 5 1 4]

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  1. anonymous
    • 5 years ago
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    assuming you know determinants, its \[1/\det(a) *(d & -b \ -c & a) if A = (a & b \ c & d)\]

  2. nowhereman
    • 5 years ago
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    You can calculate them with Gauß elimination algorithm or in lower dimensional cases with Cramer's rule.

  3. anonymous
    • 5 years ago
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    or just do a b | 1 0 c d | 0 1 and put the left side in row reduced echelon form, doing the same operations to the right side. The right side is then the inverse.

  4. anonymous
    • 5 years ago
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    thanks for info..now i can solve it...

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