# Invertible Lower Triangular Matrix, Adjoints and Inverses

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Find A^-1 using Theorem 2.1.2 - Inverse of a Matrix Using Its Adjoint: If A is an invertible matrix,

then A-1 = [1/det(A)] * [adj(A)]

A = 2 0 3

0 3 2

-2 0 -4

Prove that if A is an invertible lower triangular matrix, then A-1 is lower triangular.

See attached file for full problem description.

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#### Solution Summary

An Invertible Lower Triangular Matrix, Adjoints and Inverses are investigated. The solution is detailed and well presented.

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