I know how to find the adjugate of 3x3 matrix. from the defination.(adsbygoogle = window.adsbygoogle || []).push({});

How to find adjugate of 2x2 matrix.

e.g A= ( 1 3 )

______( 2 4 )

adjoint .

I know how to find adjugate and inverse. of 3 * 3 matrix

First . I find matrix of cofactor. from the defination. (n-1)(n-1) matrix * (sign associated with the element's position).

Second, we taking the transpose we get the adj(A)

Then we find the det(A).

Finally, A^-1 = 1/det(A) * adj(A)

The inverse of A.

[itex]AA^- = A^-A=I[/itex] and A adj(A) = det(A)I

The inverse of [itex]A = det(A)I/ A^-[/itex]

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Any one help. Adjugate of 2X2 matrix

Loading...

Similar Threads - help Adjugate matrix | Date |
---|---|

B Super basic polynomial and exponent definition help | Feb 20, 2018 |

I Question about the Divisor Function/Sums and Project Euler | Feb 16, 2018 |

B Using trig to find distance? | Jan 18, 2018 |

I Help manipulating a Physics equation | Nov 15, 2017 |

**Physics Forums - The Fusion of Science and Community**