Find the inverse of each of the given matrices by transforming the identity matrix, as in Examples

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Find the inverse of each of the given matrices by transforming the identity matrix, as in Examples 2–4.


Data from Example 4

Find the inverse of the matrix



Therefore, the required inverse matrix is


which may be checked by multiplication. See Fig. 16.8 for a calculator window showing A−1 in decimal and fractional form.

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Basic Technical Mathematics

ISBN: 9780137529896

12th Edition

Authors: Allyn J. Washington, Richard Evans

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