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OpenStudy (anonymous):
The matrix C= 1 -2 -3 7 was used to encode a phrase to 7 -28 -25 -35 -2 -21 107 90 123 17 Find C^-1 and use it to decode the matrix.
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OpenStudy (anonymous):
please help i have no idea how to do this
OpenStudy (studygurl14):
First, find the inverse of C
OpenStudy (anonymous):
ok? How do i find the inverse.
OpenStudy (studygurl14):
Inverse of 2-by-2 matrix: |dw:1414525101391:dw|
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