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Find the Determinant and Inverse Matrix
(a) Find the determinant for A by calculating the elementary products.
(b) Find the determinant for A by reducing the matrix to upper triangular form.
(c) Use a cofactor expansion to calculate the determinant for A.
(d) Find the inverse matrix A-1 by using the adjugate matrix.
(e) Use elementary row operations to find the inverse matrix A-1.
1. A stack of poles has 22 poles in the bottom row, 21 poles in the next row, and so on, with 6 poles in the top row. How many poles are there in the stack? 2. In the formula N
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